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Mukherjee, Sanchayan
- Effect of the Variation of Inter-Particle Separation Distance and Separation Time on Escape Velocity of Sediment Particles of a River Bank under the Action of Cohesive and Viscous Forces
Abstract Views :405 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata - 700032, IN
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata - 700032, IN
Source
Indian Science Cruiser, Vol 31, No 4 (2017), Pagination: 36-49Abstract
Mechanism of erosion along a riverbank is full of complexity in nature. Among many forces on the sediment particles along a riverbank, cohesive and viscous forces are predominant. A family of similar particles surrounds every particle and they are bound together under the action of cohesive and viscous forces. In this paper, sediment particles are arranged according to the truncated pyramid model and a general equation for the escape velocity of a particle has been suggested. It is observed that this escape velocity is very much dependent on the inter-particle separation distance for a given liquid bridge volume between a pair of adjacent particles. Determination of the escape velocity is an approach to quantification of volumetric erosion rate. In this paper, a comparison has been made between the values of the escape velocity obtained from a previous study considering only cohesive force and the values of the escape velocity obtained considering both cohesive and viscous forces for a particular liquid bridge volume. All the other parameters remain the same for both the cases. It has been shown that the values of the escape velocity obtained in the present study considering both cohesive and viscous forces increase a considerable amount than the values obtained in the previous study considering cohesive force only for the same input parameters.Keywords
Riverbank Erosion, Sediment Particle, Cohesive Force, Viscous Force, Separation Distance, Separation Time, Escape Velocity.
References
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- S.J.R. Simons, X. Pepin, D. Rossetti, Predicting granule behaviour through micro-mechanistic investigations, International Journal of Mineral Processing Vol 72, page 463-475, 2003
- S. Mukherjee, A. Mazumdar, Study of effect of the variation of inter-particle distance on the erodibility of a riverbank under cohesion with a new model, Journal of Hydro-environment Research. Vol 4, page 235-242, 2010
- S.S. Hsiau, S.C. Yang, Numerical simulation of self-diffusion and mixing in a vibrated granular bed with the cohesive effect of liquid bridges, Chemical Engineering Science. Vol 58, page 339-351, 2003
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- Determination of The Escape Velocity of Particles on A Riverbank Using the Truncated Pyramid Model
Abstract Views :214 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata - 700032, IN
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata - 700032, IN
Source
Indian Science Cruiser, Vol 24, No 5 (2010), Pagination: 38-46Abstract
In this paper it has been shown that the cohesive force binds the particles on a riverbank. The escape velocity of the particles is a function of the inter-particle distance, the mean radius of the particles and the volume of water entrapped between them. The escape velocity is the velocity required by a particle to get separated from the riverbank. It helps in determination of other relevant parameters like volumetric rate of bank erosion, entrainment rate and so on. Unlike the previous research here light has been thrown on the cohesive force between the adjacent particles in a deterministic manner. The influence of a gradual increase in the volume of water bridge on the escape velocity of a particle has also been studied.
An analysis of the data has been made to find the level of significance of the input parameters. This includes a regression analysis for calculation of the residual values between the predicted and the calculated escape velocities. Corresponding graphs have also been plotted to present these variations pictorially.
Keywords
Cohesive Force, Inter-Particle Distance, Water Bridge, Truncated Pyramid Model.- Influence of Viscosity on Sediment Transport along a River Bank
Abstract Views :217 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata - 700032, IN
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata - 700032, IN
Source
Indian Science Cruiser, Vol 27, No 4 (2013), Pagination: 13-17Abstract
A particle on a riverbank is subjected to a number of forces. Among them, cohesive and viscous forces are predominant, hi this present work, an analytical model called the Truncated Pyramid Model has been used to quantify the effect of the viscous force on the particles on a riverbank and the dynamic influence of water entrapped between the particles. For this, the existing model has been suitably modified to incorporate the viscous effect. The whole mechanism involves a good number of variables namely inter-particle distance, separation speed, liquid bridge volume, radius of the sphere particle and radius of the wetted area. In this work, cohesive and viscous force components have been resolved along horizontal and vertical directions and two separate differential equations have been established for horizontal and vertical components of separation speed that is varying with time. Variation of separation speed with separation distance for a particular liquid bridge volume at different times has been evaluated thereafter.
Keywords
Inter Particle Separation Distance, Separation Speed, Liquid Bridge Volume, Truncated Pyramid Model.- Effect of Cohesive and Seepage Force on A Bank Sediment Particle
Abstract Views :300 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata, Pin-700032., West Bengal, IN
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, West Bengal, IN
2 School of Water Resources Engineering, Jadavpur University, Kolkata, Pin-700032., West Bengal, IN
Source
Indian Science Cruiser, Vol 34, No 1 (2020), Pagination: 21-26Abstract
The phenomenon of erosion of a riverbank is extremely complicated and various forces act on bank sediments. Cohesive force between these grains and the force due to seepage of water play an important role among those forces. The present work uses the ‘‘Truncated Pyramid Model (TPM)’’ for the arrangement of grains and proposes generalized equations for calculating escape velocity under cohesion and seepage. The effect of seepage force along with the cohesive force has been studied for different degrees of exposure (fully exposed, half exposed and fully submerged) and compared with the previous study where only the force of cohesion was taken into account. The change in escape velocity due to seepage force for different degrees of exposure has been determined in this paper for three different grain sizes (300 µm, 400 µm and 500 µm of radius) along with different inter-particle distances.Keywords
Sediments, Riverbank Erosion, Truncated Pyramid Model, Cohesive Force, Seepage Force, Escape Velocity.References
- A.M. Osman, C.R.Throne, Riverbank stability analysis, Theory Journal of Hydraulic Engineering, Vol 114 (2), page 134-150, 1988
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- G. Duan, S.S.Y. Wang, Y. Jia, The applications of the enhanced CCHE2D model to study the alluvial channel migration process, Journal of Hydraulic Research, IAHR, Vol 39, page 469-480, 2001
- J.G. Duan, Analytical approach to calculate rate of bank erosion, Journal of Hydraulic Engineering, Vol 131 (11), page 980-989, 2005
- R. Zhang, J. Li, Simulation on mechanical behavior of cohesive soil by Distinct Element Method, Journal of Terramechanics, Vol 43, page 303-316, 2006
- F. Soulie, M.S.E. Youssoufi, F. Cherblanc, C. Saix, Capillary Cohesion and Mechanical Strength of Polydisperse Granular Materials, The European Physics Journal, E Vol 21, page 349 -357, 2006
- M. Achite, S. Ouillon, Suspended sediment transport in a semiarid watershed, Wadi Abd, Algeria (1973-1995), Journal of Hydrology, Vol 343(3-4), page 187-202, 2007
- S. Mukherjee, A. Mazumdar, Study of effect of the variation of inter-particle distance on the erodibility of a riverbank under cohesion with a new model, Journal of Hydro-environment Research, Vol 4 (3), page 235-242, 2010
- S. Mukherjee, Application of Truncated Pyramid Model in determination of escape velocity of particles of different diameters in varying conditions, International Journal of Soft Computing and Engineering (IJSCE), Vol 1(5), page 75-79, 2011
- A. Armanini, C. Gregoretti, Incipient sediment motion at high slopes in uniform flow condition, Water Resources Research, Vol 41, page W12431-8, 2005
- Experimental Study of Thermal Effect on Oscillating Hydraulic Jump
Abstract Views :299 |
PDF Views:0
Authors
Affiliations
1 School of Water Resources Engineering, Jadavpur University, Kolkata-700032, IN
2 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, IN
1 School of Water Resources Engineering, Jadavpur University, Kolkata-700032, IN
2 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, IN
Source
Indian Science Cruiser, Vol 34, No 4 (2020), Pagination: 15-19Abstract
Oscillating hydraulic jump experiments were conducted by increasing the temperature of water from minimum to maximum within a range of measurement. By varying temperature from 32-40°C, different jump characteristics were observed and noted. The varying temperature was measured throughout the jump profiles and dependence of jump parameters with varying temperature is measured and quantified. This study may find applications where a changing stream water temperature significantly affects the jump characteristics.Keywords
Rapidly Varied Flow; Subcritical Flow; Supercritical Flow; Froude Number; Sequent Depth Ratio.References
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- R E Baddour, Thermal hydraulic jump: theory and experiment, Journal of Fluid Mechanics, Vol 226, page 243-256, 1991.
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- Evaluating Cooling Coil Performance under Varying Operating Conditions
Abstract Views :105 |
PDF Views:0
Authors
Swastika Talukder
1,
Sanchayan Mukherjee
2,
Spandan Samanta
1,
Manaswita Karmakar
1,
Priyanshu Roy
1
Affiliations
1 Final Year Student, Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, Nadia, West Bengal, IN
2 Member, ISEC, and Associate Professor, Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, Nadia, West Bengal, IN
1 Final Year Student, Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, Nadia, West Bengal, IN
2 Member, ISEC, and Associate Professor, Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, Nadia, West Bengal, IN
Source
Indian Science Cruiser, Vol 37, No 2 (2023), Pagination: 25-29Abstract
The present work deals with an experimental analysis of the performance of a direct expansion coil under various operating conditions. Behaviour of the cooling coil vis-à-vis the input parameters and the psychrometric properties is assessed with the help of experimentation with changing ambient conditions and graphical presentation of the results. Results depict an optimum value of the by-pass factor indicating the best performance of the coil in both spring and summer. There is an upward trend of the by-pass factor with a gradual rise in the air temperature at different inlet openings. Dependence of the cooling coil performance on volume flow rate and climatic variation is found to be quite significant and needs to be kept in mind in practice.Keywords
Cooling Coil, By-Pass Factor, Inlet Air Temperature, Outlet Air Temperature, Apparatus Dew Point, Air Flow Rate.References
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- S Talukder, S Samanta, M Karmakar, P Roy, S Mukherjee, Quantifying Bypass Factor Variability of a Cooling Coil in an Air-Conditioning System, The IUP Journal of Mechanical Engineering, Vol 16, No 1, page 36-43, 2023.