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Chand, Ramesh

• Thermal Instability in a Layer of Nanofluid Subjected to Rotation and Suspended Particles

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Authors

Ramesh Chand ¹, G. C. Rana ², Arvind Kumar ³, Vandna Sharma ⁴

Affiliations
1 Department of Mathematics, Government College Dhaliara (Kangra), Himachal Pradesh, IN
2 Department of Mathematics, Sidharth Government College Nadaun (Hamirpur), Himachal Pradesh, IN
3 Department of Mathematics, Government College Nagrota Bagwan (Kangra), Himachal Pradesh, IN
4 Department of Mathematics, DDM College of Science and Technology Banehra (Una), Himachal Pradesh, IN

Source

Research Journal of Science and Technology, Vol 5, No 1 (2013), Pagination: 32-40

Abstract

The objective of the present work is to investigate theoretically the combined effect of rotation and suspended particles on the thermal instability in a layer of nanofluid. A linear stability theory, perturbation method and normal mode technique is used to find the solution of fluid layer confined between two free boundaries. For linear theory analysis, critical Rayleigh number has been obtained to study the stability analysis. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The onset criterion for stationary and oscillatory convection is derived analytically and graphically. The effects of various parameters such as suspended particles, rotation, Lewis number and modified diffusivity ratio on the stationary convection are studied.

Keywords

Prandtl Number, Taylor Number, Nanofluid, Suspended Particles, Lewis Number.

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References

• Alloui Z, Vasseur P, Reggio M: Natural convection of nanofluids in a shallow cavity heated from below, International Journal of Thermal Science, 50(3), 385-393, (2010).
• Buongiorno J.: Convective Transport in Nanofluids, ASME Journal of Heat Transfer, 128, 240–250, (2006).
• Chand R.: Effect of suspended particles on thermal instability of Maxwell visco-elastic fluid with variable gravity in porous medium, Antarctica J. Math., 8(6), 487-497, (2011).
• Chand, R. and Rana, G. C.: Oscillating Convection of Nanofluid in Porous Medium, Transp Porous Med, 95, 269-284, (2012a).
• Chand R. and Rana G. C.: On the onset of thermal convection in rotating nanofluid layer saturating a Darcy-Brinkman porous medium, Int. J. of Heat and Mass Transfer, 55, 5417- 5424, (2012b).
• Chand R. and Rana G. C.: Thermal Instability of Rivlin- Ericksen Elastico-Viscous Nanofluid Saturated by a Porous Medium, J. Fluids Eng., 134(12), 121203, (2012c).
• Chandrasekhar S : Hydrodynamic a n d H y d r o Magnetic Stability, Oxford University Press (Dover Publication, New York (1961).
• Choi, S.: Enhancing Thermal Conductivity of Fluids with Nanoparticles in: D. A. Siginer and H.P.Wang (Eds), Developments and Applications of Non-Newtonian Flows, ASME FED, Vol. 231/MD-Vol. 66, 99-105, (1995).
• Kim J., Kang Y. T. and Choi C. K.: Analysis of convective instability and heat transfer characteristics of nanofluids, Physics of Fluid, 16 (7), 2395-2401, (2011).
• Kuznetsov, A. V., Nield, D. A.: Effect of local Thermal Nonequilibrium on the onset of Convection in a Porous Medium Layer Saturated by a nanofluid, Transport in Porous Media 83, 425-436, (2010a).
• Kuznetsov, A. V., Nield, D. A.: Thermal instability in a porous medium layer saturated by a nanofluid: Brinkman Model, Transp. Porous Medium, 81(3), 409-422, (2010b).
• Kuznetsov, A. V., Nield, D. A.: The Onset of Double-Diffusive Nanofluid Convection in a Layer of a Saturated Porous Medium, Transport in Porous Media, 85, 3, 941-951, (2010c).
• Nield, D.A., Kuznetsov, A. V.: Thermal instability in a porous medium layer saturated by a nanofluid, Int. J. Heat Mass Transf. 52, 5796–5801, (2009).
• Nield D. A., Kuznetsov A. V.: The onset of convection in a horizontal nanofluid layer of finite depth, European Journal of Mechanics B/Fluids, 29, pp. 217–233, (2010a).
• Nield D. A., Kuznetsov A. V.: The effect of local thermal nonequilibrium on the onset of convection in a nanofluid, J. Heat Transfer, 132(5), 052405–052411, (2010b).
• Nield D. A., Kuznetsov A. V.: The onset of convection in a layer of cellular porous material: Effect of temperature-dependent conductivity arising from radiative transfer, J. Heat Transfer, 132, 7, 074503,(2010c).
• Nield D. A., Kuznetsov A. V.: The onset of double-diffusive convection in a nanofluid layer, Int. J. of Heat and Fluid Flow, 32(4), 771–776, (2011a).
• Nield D. A., Kuznetsov A. V: The Effect of Vertical Through flow on Thermal Instability in a Porous Medium Layer Saturated by a Nanofluid, Transport in Porous Media 87, 765–775, (2011b).
• Rana, G. C. and Thakur, R. C.: Effect of suspended particles on thermal convection in Rivlin-Ericksen elastico-viscous fluid in a Brinkman porous medium, Journal of Mechanical Engineering & Sciences, 2, 162–171, (2012).
• Rana, G. C., Thakur, R.C. and Kumar, K.: Thermosolutal convection in compressible Walters’ (model B) fluid permeated with suspended particles in a Brinkman porous medium, Journal of Computational Multiphase Flows, 4(2), 211–224, (2012).
• Sheu, L.J.: Thermal instability in a porous medium layer saturated with a Visco-elastic nano fluid, Transp Porous Med, 88, 461– 477, (2011a).
• Sheu, L.J.: Linear stability of convection in a visco elastic nanofluid layer, World Sci. Eng.Technol. 58, 289–295 (2011b).
• Scanlon, J. W. and Segel, L. A.: Effect of suspended particles on onset of Bénard convection, Physics Fluids, 16, 1573–78, (1973).
• Srivastava, K.M.: effect of suspended particles on the thermal convection instability in hydromagnetics, Astrophysics and Space Science 61, 143–151, (1979).
• Tzou D.Y.: Thermal instability of nanofluids in natural convection, International Journal of Heat and Mass Transfer, 51, 2967–2979, (2008a).
• Tzou D Y.: Instability of nanofluids in natural convection, ASME Journal of He a t Transfer, 30, 372-401, (2008b).
• Tzeng, S.C. Lin, C.W. and Huang, K. D.: Heat transfer enhancement of nanofluids in blade coupling of four wheel drive vechicles, Acta Mechanica, 179, 1(2), 11–23, (2005).
• Vadasz, P: Heat conduction in nanofluid suspensions. ASME J. Heat Transf. 128, 465–477, (2006).
• Xuan Y., Li Q. : Investigation of Convective Heat Transfer and Flow Features of Nanofluids, ASME Journal of Heat Transfer, 125, pp. 151–155, (2003).
• Yadav D, Agrawal, G.S. and Bhargava, R.: Thermal instability of rotating nanofluid layer, International Journal of Engineering Science 49, 1171–1184, (2011).

• Thermal Instability of Rotating Maxwell Visco-Elastic Fluid with Variable Gravity in Porous Medium

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Authors

Ramesh Chand ¹

Affiliations
1 Department of Mathematics, Govt. P. G. College, Dhaliara-177 103, Himachal Pradesh, IN

Source

The Journal of the Indian Mathematical Society, Vol 80, No 1-2 (2013), Pagination: 23-31

Abstract

The effect of variable gravity and rotation on the Thermal instability of Maxwell visco-elastic fluid in porous medium is investigated. It is found that, in case of stationary convection, variable gravity has destabilizing effect while rotation has stabilizing effect on the system whereas medium permeability has stabilizing/destabilizing effect depending upon certain condition. The mode may be non oscillatory or oscillatory.

Keywords

Thermal Instability, Maxwell Visco-elsatic Fluid, Porous Medium, Variable Gravity, Rotation.

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• Draft Genome Sequence of Cercospora canescens: A Leaf Spot Causing Pathogen

Abstract Views :263  |  PDF Views:102

Authors

Ramesh Chand ¹, Chhattar Pal ¹, Vineeta Singh ¹, Manoj Kumar ¹, Vinay Kumar Singh ², Chowdappa Pallem ³

Affiliations
1 Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, IN
2 Centre for Bioinformatics, School of Biotechnology, Banaras Hindu University, Varanasi 221 005, IN
3 ICAR-Central Plantation Crops Research Institute, Kudlu, P.O. Kasargod 671 124, IN

Source

Current Science, Vol 109, No 11 (2015), Pagination: 2103-2110

Abstract

Cercospora canescens (Ellis and Martin) is a hemibiotrophic pathogen causing leaf spot disease on mungbean (Vigna radiata L). Genome sequence (∼33.97 Mb) assembled in 8239 contigs with 10627 protein coding genes. A total of 2842 proteins were identified as homologous of 223 predicted and 7562 putative uncharacterized involved in biological processes, molecular functions. The identified proteins are mainly involved in infection process used to compromise nutrients or destroy host tissues gycosidases, transposases, cytochrome P450s, genes codes to signal transduction, cell wall breakdown, transporters, host stomata perception, adhesion, polyketide synthase and cercosporin. A total of 528 simple sequence repeats were also identified from the genome sequence assembly of C. canescens. This study provides insights into pathogenic mechanism and a better understanding of virulence differentiation of C. canescens. It will also help in identification of similarity and differences in regions among the genomes of different species of Cercospora.

Keywords

Cercospora canescens, Functional Annotation, Gene Prediction, Sequencing and Assembly, Vigna radiata.

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References

• Raturi, A., Singh, S. K., Sharma, V. and Pathak, R., Stability and environmental indices analyses for yield attributing traits in Indian Vigna radiata genotypes under arid conditions. Asian J. Agric. Sci., 2012, 4, 126–133.
• Project coordinator’s report (mungbean and urdbean), All India coordinated research project on MULLaRP, Indian Institute of Pulses Research, Kanpur, 2013–2014.
• Iqbal, S. M., Jubair, M. and Malik, B. A., Control of cercospora leaf spot of mungbean by foliar fungicides. Pak. J. Phytopathol., 1995, 7, 84–85.
• Kapadiya, H. J. and Dhruj, I. U., Management of mungbean cercospora leaf spot through fungicides. Indian Phytopathol., 1999, 52(1), 96–97.
• Sompong, C., Somta, P., Sorjjapinum, W. and Srinives, P., Quantitative trait loci mapping of Cercospora leaf spot resistance in mungbean, Vigna radiata, Mol. Breed., 2011, 28, 255–264.
• Grewal, J. S., Pal, M. and Kulshrestha, D. D., Control of cercospora leaf spot of greengram by spraying bavistin. Indian J. Agric. Sci., 1980, 50, 707–711.
• Shanmugasundram, S., Mungbean varietal improvement, AVRDC, Taiwan, 1987, pp. 1–49.
• Chand, R., Singh, V., Pal, C., Kumar, P. and Kumar, M., First report of a new pathogenic variant of Cercospora canescens on mungbean (Vigna radiata) from India. New Dis. Rep., 2012, 26, 6; doi: org/10.5197/j.2044‐0588.2012.026.006.
• Gupta, S. K., Bansal, R. and Gopalakrishna, T., Development and characterization of genic SSR markers for mungbean (Vigna radiata (L.) Wilczek) Euphytica, 2014, 195, 245–258; doi: 10.1007/s10681-013-0993-0.
• Poehlman, J. M., What we have learned from the international mungbean nurseries. In Proceedings of the First International mungbean Symposium, University of Phillipines, Los Banos, 1977, pp. 97–100.
• Agrawal, S. C., Diseases of Greengram and Blackgram, International Book Distributors, Dehradun, 1993, p. 321.
• Goode, M. J. and Brown, G. R., Detection and characterization and Cercospora citrullina isolates that sporulate readily in culture. Phytopathology, 1970, 30, 1502–1503.
• Chand, R., Kumar, P., Singh, V. and Pal, C., Technique for spore production in Cercospora canescens. Indian Phytopthol., 2013, 66, 159–163.
• Daub, M. E., Cercosporin, a photosensitizing toxin from Cercospora species Phytopathology, 1982, 72, 370–374.
• Groenewald, J. Z. et al., Species concepts in Cercospora: spotting the weeds among the roses. Stud. Mycol., 2013, 75, 115–170.
• Chen, H., Lee, M. H., Daub, M. E. and Chung, K. R., Molecular analysis of the cercosporin biosynthetic gene cluster in Cercospora nicotianae. Mol. Microbiol., 2007, 64, 755–770.
• Zhang, G. R., Newman, M. A. and Bradley, C. A., First report of the soybean frogeye leaf spot fungus (Cercospora sojina) resistant to quinone outside inhibitor fungicides in North America. Plant Dis., 2012, 96, 767.
• Karaoglanidis, G. S. and Bardas, G., Control of benzimidazoleand DMI-resistant strains of Cercospora beticola with strobilurin fungicides. Plant Dis., 2006, 90, 419–424.
• Murray, M. G. and Thompson, W. F., Rapid isolation of high molecular weight plant DNA. Nucleic Acids Res., 1980, 8, 4325.
• Stanke, M. and Morgenstern, B., AUGUSTUS: a web server for gene prediction in eukaryotes that allows user-defined constraints. Nucleic Acids Res., 2005, 33, W465–W467.
• Altschul, S. F., Madden, T. L., Schäffer, A. A., Zhang, J., Zhang, Z., Miller, W. and Lipman, D. J., Gapped BLAST and PSIBLAST: a new generation of protein database search programs. Nucleic Acids Res., 1997, 25, 3389–3402.
• Ashburner, M. et al., Gene ontology: tool for the unification of biology. Gene Ontol. Consort. Nature Genet., 2000, 25, 25–29.
• Thiel, T., Michalek, W., Varshney, R. K. and Graner, A., Exploiting EST databases for the development and characterization of gene-derived SSR-markers in barley (Hordeum vulgare L.). Theor. Appl. Genet., 2003, 106, 411–422.
• da Maia, L. C., Palmieri, D. A., de Souza, V. Q., Kopp, M. M., de Carvalho, F. I. and Costa de Oliveira A., SSR Locator: tool for simple sequence repeat discovery integrated with primer design and PCR simulation,. Int. J. Plant Genomics, 2008; doi: 10.1155/2008/412696
• Koressaar, T. and Remm, M., Enhancements and modifications of primer design program Primer3. Bioinformatics, 2007, 23, 1289– 1291.
• Thompson, J. D., Higgins, D. G. and Gibson, T. J., CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position- specific gap penalties and weight matrix choice. Nucleic Acids Res., 1994, 22, 4673– 4680.
• Kumar, S., Tamura, K. and Nei, M., MEGA: Molecular Evolutionary Genetics Analysis software for microcomputers. Comput. Appl. Biosci., 1994, 10, 189–191.
• Hunter, S. et al., InterPro: the integrative protein signature database. Nucleic Acids Res., 2009, 37, D211–D215.
• Zerbino, D. R. and Birney, E., Velvet: algorithms for de novo short read assembly using de Bruijn graphs. Genome Res., 2008, 18, 821–829.
• Annadurai, R. S. et al., Next generation sequencing and de novo transcriptome analysis of Costus pictus D. Don, a non-model plant with potent anti-diabetic properties. BMC Genomics, 2012, 13, 663.
• Dean, R. A. et al., The genome sequence of the rice blast fungus Magnaporthe grisea. Nature, 2005,434, 980–986.
• Magrane, M. and Consortium, U., UniProt Knowledgebase: a hub of integrated protein data. Database (Oxford). 2011; doi: 10.1093/database/bar009.
• H., Xu, X., Wang, Y., Bajpai, V. K., Huang, L., Chen, Y. and Baek, K. H., The mitogen-activated protein kinase signal transduction pathways in Alternaria species. Plant Pathol. J., 2012, 28, 227–238.
• Chen, H. Q., Lee, M. H. and Chung, K. R., Functional characterization of three genes encoding putative oxidoreductases required for cercosporin toxin biosynthesis in the fungus Cercospora nicotianae. Microbiology, 2007, 153, 2781–2790.
• Shim, W. B. and Dunkle, L. D., CZK3, a MAP kinase kinase kinase homolog in Cercospora zeaemaydis, regulates cercosporin biosynthesis, fungal development, and pathogenesis. Mol. Plant Microbe Interact., 2003, 16, 760–768.
• Dixon, K. P., Xu, J. R., Smirnoff, N. and Talbot, N. J., Independent signaling pathways regulate cellular turgor during hyperosmotic stress and appressorium-mediated plant infection by Magnaporthe grisea. Plant Cell, 1999, 11, 2045–2058.
• Beckman, P. M. and Payne, G. A., External growth, penetration and development of Cercospora zea-maydis in corn leaves. Phytopathology, 1982, 72, 810–815.
• Xu, J. R. and Hamer, J. E., MAP kinase and cAMP signaling regulate infection structure formation and pathogenic growth in the rice blast fungus Magnaporthe grisea. Genes Dev., 1996, 10, 2696–2706.
• Cantarel, B. L., Coutinho, P. M., Rancurel, C., Bernard, T., Lombard, V. and Henrissat, B., The Carbohydrate-Active Enzymes database (CAZy): an expert resource for glycogenomics. Nucleic Acids Res., 2009, 37, D233–D238.
• Davies, G. and Henrissat, B., Structures and mechanisms of glycosyl hydrolases. Structure, 1995, 3, 853–859.
• Ma, D. and Li, R., Current understanding of HOG-MAPK pathways in Aspergillus fumigatus. Mycopathology, 2013, 175, 13–23.
• Islam, M. S. et al., Tools to kill: genome of one of the most destructive plant pathogenic fungi Macrophomina phaseolina. BMC Genomics, 2012, 13, 493.
• Kulkarni, R. D., Thon, M. R., Pan, H. and Dean, R. A., Novel Gproteincoupled receptor-like proteins in the plant pathogenic fungus Magnaporthe grisea. Genome Biol., 2005, 6, R24.
• Choi, W. and Dean, R. A., The adenylate cyclase gene MAC1 of Magnaporthe grisea controls appressorium formation and other aspects of growth and development. Plant Cell, 1997, 9, 1973– 1983.
• Beck, J., Ripka, S., Siegner, A., Schiltz, E. and Schweizer, E., The multi-functional 6-methylsalicylic acid synthase gene of Penicillium patulum: its gene structure relative to that of other polyketide synthases. Eur. J. Biochem., 1990, 192, 487–498.
• Daub, M. E. and Chung, K.-R., Cercosporin: a phytoactivated toxin in plant disease. APSnetFeatures., 2007, doi: 10.1094/ APSnetFeature/2007-0207.
• Karaoglu, H., Lee, C. M. Y. and Meyer, W., Survey of simple sequence repeats in completed fungal genomes. Mol. Biol. Evol., 2005, 22, 639–649.

• Madan Mohan Malaviya's Vision on Agriculture Education and Research

Abstract Views :254  |  PDF Views:89

Authors

Ramesh Chand ¹, Vinod Kumar Mishra ¹

Affiliations
1 Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, IN

Source

Current Science, Vol 108, No 6 (2015), Pagination: 1029-1030

Abstract

No Abstract.

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• Natural Parasitism of Pomegranate Butterfly, Deudorix epijarbas Moore in Mid-Hill Regions of Solan and Sirmaur, Himachal Pradesh

Abstract Views :150  |  PDF Views:129

Authors

U. S. Rawat ¹, A. D. Pawar ¹, R. Singh ¹, Ramesh Chand ¹

Affiliations
1 Central Biological Control Station, Solan 173 212, IN

Source

Journal of Biological Control, Vol 3, No 1 (1989), Pagination: 65-66

Abstract

The pomegranate butterfly, Deudorix epijarbas Moore has in recent years gained much economic importance in the mid-hill· regions of Himachal Pradesh (Kakar et al., 1987; Prasad et al., 1987 and Thakur et al., 1988b). Sometimes, the damage is so severe that the whole fruit is ruined and it becomes unsuitable for consumption. Since chemical control of this pest is neither feasible nor economical (Kakar and Sharma, 1988), the present study was undertaken to find out the natural enemies of D. epijarbas and their natural parasitism in the mid-hill areas of Solan and Sirmaur districts in Himachal Pradesh, where pomegranate is grown as a wild form.

Keywords

Natural Parasitisation, Deudorix epijarbas, Telenomus cyrus, Apanteles vitripennis, Biocontrol, Correlation.

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• On the Onset of Electrohydrodynamic Instability of Rivlin-Ericksen Viscoelastic Dielectric Fluid Layer

Abstract Views :188  |  PDF Views:1

Authors

G. C. Rana ¹, Rakesh Kumar ², Ramesh Chand ³

Affiliations
1 Department of Mathematics, Sidharth Govt. College, Nadaun-177 005, Himachal Pradesh, IN
2 Department of Physics, Sidharth Govt. College, Nadaun-177 005, Himachal Pradesh, IN
3 Department of Mathematics, Govt. College Dharampur, District Mandi, Himachal Pradesh, IN

Source

Research Journal of Engineering and Technology, Vol 6, No 1 (2015), Pagination: 13-18

Abstract

In this paper we investigate the effect of AC electric field on the onset of instability of an elastico-viscous Rivlin-Ericksen dielectric fluid layer stimulated by the dielectrophoretic force due to the variation of dielectric constant with temperature. By applying linear stability theory and normal mode analysis method, we derive the dispersion relation describing the influence of viscelasticity and AC electric field. For the case of stationary convection, it is observed that Rivlin-Ericksen fluid behaves like an ordinary Newtonian fluid whereas AC electric field hastens the stationary convection. The present results are in good agreement with the earlier published results.

Keywords

Walter’ (Model B') Fluid, AC Electric Field, Electrohydrodynamic, Viscosity, Viscoelasticity.

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• Megneto-Convection in a Layer of Maxwell Visco-Elastic Fluid in a Porous Medium with Soret Effect

Abstract Views :156  |  PDF Views:1

Authors

Ramesh Chand ¹, S. K. Kango ², Vikram Singh ³

Affiliations
1 Department of Mathematics, Government College, Nurpur, HP, IN
2 Department of Mathematics, Government College Haripur (Manali), HP, IN
3 Department of Mathematics, Jawalaji Degree College Jawalamukhi, HP, IN

Source

Research Journal of Engineering and Technology, Vol 6, No 1 (2015), Pagination: 23-30

Abstract

Double Diffusive convection in a horizontal layer of Maxwell visco-elastic fluid in a porous medium in the presence of constant vertical magnetic field and Soret coefficient is investigated. Flow in porous medium is characterized by Darcy model. The normal mode method is used to find linear stability analysis for the fluid layer confined between two free-free boundary surfaces. The stability criterions for stationary and oscillatory convection have been derived. Effects of various parameters on the stationary have been obtained analytically and graphically.

Keywords

Maxwell Visco-Elastic Fluid, Chandrasekhar Number, Soret Parameter, Rayleigh-Darcy Number, Magnetic Prandtl Number.

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• Effect of Rotation on the Onset of Compressible Rivlin-Ericksen Fluid Heated from Below Saturating a Darcy-Brinkman Porous Medium

Abstract Views :157  |  PDF Views:0

Authors

G. C. Rana ¹, Ramesh Chand ²

Affiliations
1 Department of Mathematics, NSCBM Govt. P. G. College, Hamirpur-177 005, Himachal Pradesh, IN
2 Department of Mathematics, Govt. P. G. College, Dhaliara-177 103, Himachal Pradesh, IN

Source

Research Journal of Engineering and Technology, Vol 3, No 2 (2012), Pagination: 76-81

Abstract

The effect of rotation on the onset of convection in compressible Rivlin-Ericksen elastico-viscous fluid heated from below saturating a porous medium is considered. For the porous medium, the Brinkman model is employed. By applying normal mode analysis method, the dispersion relation has been derived and solved analytically. It is observed that the medium permeability, compressibility, gravity field and viscoelasticity introduce oscillatory modes. For stationary convection, the rotation has stabilizing effect whereas Darcy number and medium permeability have destabilizing/stabilizing effect on the system under certain conditions. The effects of rotation, Darcy number and medium permeability have also been shown graphically.

Keywords

Rivlin-Ericksen Fluid, Thermal Convection, Viscoelasticity, Rotation, Brinkman-Porous Medium.

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• Effect of Rotation on Thermal Instability of Oldroydian Visco-Elastic Fluid Saturated by Brinkman Darcy Porous Medium

Abstract Views :160  |  PDF Views:0

Authors

Ramesh Chand ¹

Affiliations
1 Department of Mathematics, Government P. G. College, Dhaliara-177103, Himachal Pradesh,, IN

Source

Research Journal of Engineering and Technology, Vol 3, No 2 (2012), Pagination: 92-99

Abstract

The effect of rotation on the thermal instability of Oldroydian visco-elastic fluid in porous medium is studied. The Brinkman-Darcy model has been used for porous medium. A linear stability analysis based upon normal mode analysis is used to find solution of the fluid layer confined between two free boundaries. The onset criterion for stationary and oscillatory convection is derived analytically and graphs have been plotted to study the effects of the Taylor number and Brinkman-Darcy number on the stationary convection.

Keywords

Thermal Instability, Oldroydian Visco-Elastic Fluid, Brinkman-Darcy Number, Prandtl-Darcy Number, Rotation.

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• Triple-Diffusive Convection in a Layer of Viscoelastic Nanofluid

Abstract Views :221  |  PDF Views:0

Authors

G. C. Rana ¹, Ramesh Chand ², S. K. Kango ³

Affiliations
1 Department of Mathematics, NSCBM Govt. College, Hamirpur-177005, Himachal Pradesh, IN
2 Department of Mathematics, Govt. College, Nurpur-177 103, District Kangra, Himachal Pradesh, IN
3 Department of Mathematics, Govt. College, Barsar, District Hamirpur, Himachal Pradesh, IN

Source

International Journal of Technology, Vol 6, No 2 (2016), Pagination: 71-80

Abstract

Triple-diffusive convection in a horizontal layer of nanofluid heated from below and salted from above and below is considered. The Rivlin-Ericksen type fluid model is used to describe the rheological behavior of viscoelastic nanofluid. The effects of thermophoresis and Brownian diffusion parameters are also introduced through Buongiorno model in the governing equations. By using linear stability analysis and normal modes analysis method, the dispersion relation accounting for the effect of various parameters is derived. The influences of solute-Rayleigh number, analogous solute-Rayleigh number, thermo-nanofluid Lewis number, modified diffusivity ratio and nanoparticle Rayleigh number on the stability of stationary convection are presented analytically and graphically.

Keywords

Convection, Triple-Diffusive, Nanofluid, Nanoparticles, Rayleigh Number.

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• Thermal Instability of Rotating Kuvshiniski Viscoelastic Nanofluid in a Porous Medium

Abstract Views :181  |  PDF Views:3

Authors

Ramesh Chand ¹, G. C. Rana ², S. K. Kango ³

Affiliations
1 Department of Mathematics, Government College Nurpur, Himachal Pradesh, IN
2 Department of Mathematics, NSCBM Govt. College, Hamirpur-177005, Himachal Pradesh, IN
3 Department of Mathematics, Government College Barsar, Himachal Pradesh, IN

Source

Research Journal of Science and Technology, Vol 9, No 1 (2017), Pagination: 1-8

Abstract

Thermal instability in a horizontal layer of Kuvshiniski viscoelastic nanofluid for more realistic boundary conditions is studied theoretically within the frame work of linear theory. The flux of volume fraction of nanoparticles is taken to be zero on the isothermal boundaries. For porous medium Brinkman model is taken into consideration and the model used for nanofluid incorporates the effect of Brownian diffusion and thermophoresis. The stability criterion for stationary and oscillatory convection have been derived and graphs have been plotted to study the effects of rotation, the Brinkman-Darcy number, the Lewis number, the modified diffusivity ratio and porosity parameter on the stationary convection.

Keywords

Kuvshiniski Viscoelastic Fluid, Rotation, Brownian Motion, Galerkin Technique, Porous Medium.

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• Revisiting Groundwater Depletion and its Implications on Farm Economics in Punjab, India

Abstract Views :264  |  PDF Views:79

Authors

S. K. Srivastava ¹, Ramesh Chand ², Jaspal Singh ¹, Amrit Pal Kaur ¹, Rajni Jain ¹, I. Kingsly ¹, S. S. Raju ³

Affiliations
1 ICAR-National Institute of Agricultural Economics and Policy Research, DPS Marg, Pusa, New Delhi 110 012, IN
2 NITI Aayog, Government of India, New Delhi 110 001, IN
3 ICAR-Central Marine Fisheries Research Institute, Visakhapatnam 530 003, IN

Source

Current Science, Vol 113, No 03 (2017), Pagination: 422-429

Abstract

The study identifies factors behind the groundwater depletion in Punjab (India) and examines the economics of groundwater irrigation across farm-size categories, varied groundwater levels and energy policy scenario. The farm-level evidences point out that farmers with smaller land holdings incur 2-3 times groundwater cost than those with larger land holdings. Also, small farmers are affected more adversely due to falling groundwater level. Further, financial expenses in extracting groundwater are borne equally by the society and the farmers. The withdrawal of energy subsidy is expected to reduce net returns, but at a varying rate across different crops. However, crop cultivation would still be profitable and desubsidization will result in 29-82% savings in existing groundwater use in different crops.

Keywords

Crop Profitability, Energy Subsidy, Farm Economics, Groundwater Depletion.

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References

• Sidhu, R. S., Vatta, K. and Dhaliwal, H. S., Conservation agriculture in Punjab: economic implications of technologies and practices. Indian J. Agric. Econ., 2010, 53(3), 1413–1427.
• Kaur, S. and Vatta, K., Groundwater depletion in central Punjab: pattern, access and adaptations. Curr. Sci., 2015, 108(4), 485–490.
• Kaur, B., Sidhu, R. S. and Vatta, K., Optimal crop plans for sustainable water use in Punjab. Agric. Econ. Res. Rev., 2010, 23, 273–284.
• Sarkar, A., Scio-economic implications of depleting groundwater resources in Punjab: a comparative analysis of different irrigation systems. Econ. Polit. Wkly, 2011, 46(7), 59–66.
• Srivastava, S. K. et al., Unsustainable groundwater use in Punjab agriculture: insights from cost of cultivation survey. Indian J. Agric. Econ., 2015, 70(3), 365–378.
• Gupta, S., Groundwater management in alluvial areas. In Technical Paper in Special Session on Groundwater in the Fifth Asian Regional Conference on Indian National Committee on Irrigation and Drainage (INCID), New Delhi, 2009.
• Srivastava, S. K., Srivastava, R. C., Sethi, R. R., Kumar, A. and Nayak, A. K., Accelerating groundwater and energy use for agricultural growth in Odisha: technological and policy issues. Agric. Econ. Res. Rev., 2014, 27(2), 259–270.
• Ballabh, V., Policies of water management and sustainable water use. Indian J. Agric. Econ., 2003, 58(3), 467–476.
• Ghosh, S., Srivastava, S. K., Nayak, A. K., Panda, D. K., Nanda, P. and Kumar, A., Why impacts of irrigation on agrarian dynamism and livelihoods are contrasting? Evidence from eastern India states. Irrig. Drain., 2014, 65(3), 573–583.
• Sekhri, S., Sustaining groundwater: role of policy reforms in promoting conservation in India. In India Policy Forum, 2012/2013 (eds Shah, S., Bosworth, B. and Panagariya, A.), Sage Publications, New Delhi, 2013, vol. 9, pp. 149–176.
• Sarkar, A. and Das, A., Groundwater irrigation–electricity–crop diversification nexus in Punjab: trends, turning points and policy initiatives. Econ. Polit. Wkly, 2014, 49(52), 64–73.
• Malik, R. P. S., Energy regulations as a demand management option: potentials, problems, and prospects. In Strategic Analyses of the National River Linking Project (NRLP) of India, Series 3, Promoting Irrigation Demand Management in India: Potentials, Problems and Prospects (ed. Saleth, R. M.), International Water Management Institute, Colombo, Sri Lanka, 2008, pp. 71–92.
• Chand, R., Emerging crisis in Punjab agriculture: Severity and options for future. Econ. Polit. Wkly, 1999, 34(13), A2–A10.
• Kumar, D., Demand management in the face of growing water scarcity and conflicts in India: Institutional and policy alternatives for future. In Water Resources and Sustainable Livelihoods and Eco-System Services (eds Chopra, K., Rao, C. H. H. and Sengupta. R.), Concept Publishing Company, New Delhi, 2009, pp. 97–131.
• Kulkarni, H. and Shah, M., Punjab water syndrome: diagnostics and prescriptions. Econ. Polit. Wkly., 2013, 48(52), 64–73.
• Government of India, Fourth Census of Minor Irrigation Schemes Report, Ministry of Water Resources, River Development and Ganga Rejuvenation, New Delhi, 2014.
• Central Groundwater Board, Dynamic Groundwater Resources of India (as on 31 March 2011). Ministry of Water Resources, River Development and Ganga Rejuvenation, Faridabad, 2014.
• Government of Punjab, Punjab at a Glance (district-wise), Economic Advisor to Government of Punjab, Department of Planning, 2012.
• Central Groundwater Board, Master plan for artificial recharge to groundwater in India, Ministry of Water Resources, Government of India, 2013; http://cgwb.gov.in/documents/MasterPlan2013.pdf.
• Singh, K., Act to save groundwater in Punjab: its impact on water table, electricity subsidy and environment. Agric. Econ. Res. Rev., 2009. 22 (conference issue), 365–386.
• Kaul, J. L. and Sekhon, S., Flexibility and reliability of irrigation systems and their effect on farming: a case of Punjab. Indian J. Agric. Econ., 1991, 46(4), 587–592.
• Singh, D., Who gains and who loses in the game of groundwater markets in water-scarce regions. Agric. Econ. Res. Rev., 2007, 20(2), 345–360.
• Moench, M. H., Chasing the water table: equity and sustainability in groundwater management. Econ. Polit. Wkly., 1992, 27(51–52), A171–A177.
• Rosegrant, M., Water resources in 21st century: challenges and implications for action. Food, Agriculture and Environment Discussion Paper 20, International Food Policy Research Institute, Washington, USA, 1997.
• Kumar, M. D., Impact of electricity prices and volumetric water allocation on energy and groundwater demand management: analysis from western India. Energ. Policy, 2005, 33(1), 39–51.
• Briscoe, J. and Malik, R. P. S., India’s Water Economy: Bracing for a Turbulent Future, Oxford University Press, New Delhi, 2006.

• Evaluation of Resistance for Early Blight Caused by Alternaria solani (Ellis and Martin) Sorauer in Tomato

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Authors

S. M. Yadav ¹, Vineeta Singh ¹, Major Singh ², Laxman Prasad Balai ³, Ramesh Chand ¹

Affiliations
1 Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), IN
2 Division of Crop Improvement, Indian Institute of Vegetable Research, Varanasi (U.P.), IN
3 ICAR, CAZRI, KrishiVigyan Kendra, Pali (Rajasthan), IN

Source

Asian Journal of Bio Science, Vol 12, No 2 (2017), Pagination: 87-99

Abstract

A trial was conducted during Rabi season 2011-2012 under field conditions for phenotyping of germplasm under natural conditions that have been developed for resistance against early blight of tomato caused by Alternaria solani. Field studies showed significant variation among all tested germplasmlines with respect to early blight disease assessment. Under field conditions the natural disease severity was scored on a five-point scale (0-5).The per cent disease index (PDI) and area under disease progress curve (AUDPC) value were calculated on the basis of data recorded. The mean AUDPC value in resistant (206 lines); moderately resistant (223 lines); moderately susceptible (129 lines) and susceptible (143 lines) tomato lines ranged between 102.00 to 447.25; 447.26 to 792.50; 792.51 to 1137.75 and 1137.76 to 1483.00, respectively.

Keywords

Alternaria solani, Tomato, Natural Inoculums, Phenotyping, Resistant, AUDPC.

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References

• Barksdale, T. H. (1971). Field evaluation for tomato early blight resistance. Plant Dis. Rep., 55:807-809.
• Barksdale, T.H. and Stoner, A.K. (1977). A study of the inheritance of tomato early blight resistance. Plant Dis. Rep., 61: 63-65.
• Basu, P. K. (1974). Measuring early blight, its progress and influence on fruit losses in nine tomato cultivars. Can Plant Dis. Surv., 54 : 45-51.
• Datar, V. V. and Mayee, C. D. (1981). Assessment of losses in tomato yields due to early blight. Indian Phytopathol., 34 : 191–195.
• Foolad, M.R., Ntahimpera, N., Christ, B.J. and Lin, G.Y. (2000). Comparison of field, greenhouse and detached leaflet evaluations of tomato germplasm for early blight resistance. Plant Dis., 84: 967-972.
• Gwary, D. M. and Nahunnaro, H. (1998). Epiphytotics of early blight of tomatoes in Northeastern Nigeria. Crop Prot., 17: 619-624.
• Johnson, D. A. and Wilcoxson, R. D. (1982). A talbe of areas under disease progress curve. In: Technical Bulletin. Texas Agricultural Experiment Station Texas.
• Keinath, A., DuBose, V.B. and Rathwell, P.J. (1996).Efficacy and economics of three fungicide application schedules for early blight control and yield of fresh market tomato. Plant Disease., 80: 1277-1282.
• Madden, L., Pennypacker, S. P. and MacNab (1978). FAST a forecast system for Alternaria solani on tomato. Phytopathology, 68: 1354-1358.
• Maiero, M., Ng, T. J. and Barksdale, T. H. (1989).Combining ability estimates for early blight resistance in tomato. J. Am. Soc. Hort. Sci., 114 : 118-121.
• Maiero, M., Ng, T.J. and Barksdale, T.H. (1990a). Genetic resistance to early blight in tomato breeding lines. Hort. Sci., 25: 344-346.
• Maiero, M., Ng, T.J. and Barksdale, T.H. (1990b). Inheritance of collar rot resistance in the tomato breeding lines C1943 and NC EBR-2.Phytopathology,80: 1365-1368.
• Nash, A.F. and Gardner, R.G. (1988). Heritability of tomato early blight resistance derived from Lycopersicon hirsutum PI 126445. J. Am. Soc. Hort. Sci., 113: 264-268.
• Peralta, I. E., Knapp, S. and Spooner, D. M. (2005). New species of wild tomatoes (Solanum lycopersicon: Solanaceae) from Northern Peru. Sys. Bot., 30: 424-434.
• Rotem, J. and Reichert, I. (1964). Dew a principal moisture factor enabling early blight epidemics in a semiarid region of Israel. Plant Dis. Rep., 48:211–215.
• Shaner, G. and Finney, R. E. (1977). The effect of nitrogen fertilization on the expression of slow-mildewing resistance in ‘Knox’ wheat. Phytopathology, 67 : 1051 – 1056.
• Sherf, A. F. and MacNab, A.A. (1986). Vegetable diseases and their control. John Wiley and Sons, New York, pp. 634-640.
• Shtienberg, D., Blachinsky, D., Kremer, Y., Ben-Hador, G. and Dinoor, A. (1995). Integration of genotype and age-related resistance to reduce fungicide use in management of Alternaria diseases of cotton and potato. Phytopathology, 85: 995-1002.
• Vakalounakis, D.J. (1983). Evaluation of tomato cultivars for resistance to Alternaria blight. Ann. Appl. Biol., 102: 138-139.
• Walker, J.C. (1952). Diseases of vegetable crops, 1^st Ed. Mac Graw-Hill Book Company, Inc. New York, pp. 471-474.
• Walter, J.M., Kelbert, D.G.A. and Hayslip, N.C. (1961). Manapal, a disease resistance tomato with the desirable traits of Rutgars. Florida University Agricultural Experimental Station, Gainesville Circ S–131.
• Wheeler, B. E. J. (1969). An Introduction to plant diseases. John Wiley and Sons Limited, London, pp.301.
• Anonymous (2012). APEDA, Agriculture Data Base, http://agriexchange.apeda.gov.in.