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- CFD Analysis of Fish Movement in Open Channel under Laminar Flow Condition
Abstract Views :326 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, Jalpaiguri Govt. Engineering College, Jalpaiguri - 735102, IN
1 Department of Mechanical Engineering, Jalpaiguri Govt. Engineering College, Jalpaiguri - 735102, IN
Source
Journal of the Association of Engineers, India, Vol 89, No 3-4 (2019), Pagination: 54-63Abstract
Understanding the movement techniques of a fish in water has numerous applications far outside of biology. Biological propulsion has evolved over millions of years into a finely refined, efficient system of locomotion which cannot be matched by any technique developed by man. Thus leaving man no other options but studying the techniques engineered by nature itself. The objective of the paper is to study the motion of a fish in an open channel flow by CFD analysis of a fish under laminar flow conditions. The different step of fish positions was created by surface modelling in a CAD platform Solidworks 15.0 to study its movements. The purpose of this simulation was to learn the performance and usability of a method of surface model analysis based CFD. A CFD tool ANSYS Fluent version 16.2 was used to do the finite volume analysis of the fish models. The analysis is done on the fish profile over a square domain by creating mesh ANSYS Fluent itself. The analysis was done to study the pressure and velocity gradients generated at different points of the fish contour which aid the fish movement in an upstream condition. The lift and drag co-efficient are obtained after the analysis. The result shows how the fish produce thrust by moving its body parts in rhythmic manner.Keywords
Fish Movement, CFD Analysis, 2D Model, Laminar Flow Condition.
References
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- An Experimental Study of Grinding Performances of a Mild Steel under Different Environmental Conditions using Various Types of Nozzles
Abstract Views :391 |
PDF Views:126
Authors
Affiliations
1 Department of Mechanical Engineering, Jalpaiguri Government Engineering College, Jalpaiguri- 735102, IN
1 Department of Mechanical Engineering, Jalpaiguri Government Engineering College, Jalpaiguri- 735102, IN
Source
Reason-A Technical Journal (Formerly Reason-A Technical Magazine), Vol 17 (2018), Pagination: 48-56Abstract
Grinding is a mechanical metal removal process used in manufacturing industries. In this process, the material is removed from a work-piece material by an abrasive wheel. This process gives better surface finish and close tolerance. Grinding process removes material by shearing, ploughing, rubbing and brittle fracture with high- speed and a high input of energy per unit volume. The coolant or grinding fluid is used to reduce the temperature in grinding zone and also it is used as a lubricant into grinding zone. In present work, a five port multi-nozzle system has been developed and performance of this nozzle has been compared with flood type copper cooling nozzle under different environmental conditions. Two parameters (chip characteristics, surface roughness) of grinding are considered to find the suitable process for grinding of a mild steel specimen. From this experimental investigation, it can be observed that in wet condition, five port multi-nozzle system provides better surface finish as well as it is more economical.Keywords
Five Port Multi-nozzle, Surface Roughness, Depth of Cut, Grinding, Chip, Dry Test.Full Text
References
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- Mandal, B., Majumdar, S., Das, S. and Banerjee, S., Formation of a Significantly Less Stiff Air Layer around a Grinding Wheel with a Rexine Leather Pasted Wheel, International Journal of Precision Technology, Vol.2, No.1, pp.12-20, 2011.
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- Mandal, B., Biswas, D., Sarkar, A., Das, S. and Banerjee, S. Grinding Performance Using a Compound Nozzle Characterized by Small Discharge of Fluid, Journal of the Association of Engineers, India, Vol.83, No.1, pp.28-35, 2013.
- Numerical Validation of Flow Boiling Analysis in Ansys Fluent with VOF Approach
Abstract Views :415 |
PDF Views:170
Authors
Affiliations
1 Department of Mechanical Engineering, Jalpaiguri Govt. Engineering College, Jalpaiguri- 735102, India, IN
1 Department of Mechanical Engineering, Jalpaiguri Govt. Engineering College, Jalpaiguri- 735102, India, IN
Source
Reason-A Technical Journal (Formerly Reason-A Technical Magazine), Vol 18 (2019), Pagination: 16-24Abstract
The present paper represents a numerical analysis of "ow boiling with volume of "uid (VOF) approach. The analysis has been carried out with the commercial CFD solver ANSYS Fluent 14.5. The said work is focused to demonstrate the suitability of the existing models in ANSYS Fluent to simulate precisely the boiling phenomenon when the "uid is in motion inside heated pipe. The proposed boiling dynamics is carried out with the available VOF approach inANSYS Fluent. The boiling process is handled with the evaporation and condensation model. The said work is validated with an existing experimental work and the validation shows good agreement. There is some error in this validation. That is because boiling phenomenon is highly turbulent and transient phenomenon. Boiling process deviates from the expected behaviour with little perturbation of heat transfer, surface temperature and "ow !eld etc.Another reason of error is that the boiling phenomenon is a highly localized process. The same type of "ow !eld may not present if authors replicate the same "ow boiling process. Overall, the proposed work shows satisfactory match with the said experimental work. This points out that one can use VOF model with evaporation-condensation boiling phenomenon for further hydro-geometric analyses of "ow boiling.Keywords
Flow Boiling, VOF Approach, Evaporation-condensation, Pipe Flow, Boiling.Full Text
References
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- Remi, R. and John, R.T., Experimental Investigation of R-134A And R 245FA Two-Phase Flow in Microchannels for Different Flow Conditions. International Journal of Heat and Fluid Flow, Vol. 28, pp.63–71, 2007
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- Estimation of Drilling Burr Formation with Artificial Neural Network Analysis
Abstract Views :281 |
PDF Views:0
Authors
Affiliations
1 Kalyani Govt. Engineering College, Kalyani- 741235, Dist. Nadia, West Bengal, IN
2 Jalpaiguri Govt. Engineering College, Jalpaiguri- 735102, Dist. Jalpaiguri, West Bengal, IN
3 Kanchrapara Railway Workshop, Eastern Railway, West Bengal– 731345, IN
1 Kalyani Govt. Engineering College, Kalyani- 741235, Dist. Nadia, West Bengal, IN
2 Jalpaiguri Govt. Engineering College, Jalpaiguri- 735102, Dist. Jalpaiguri, West Bengal, IN
3 Kanchrapara Railway Workshop, Eastern Railway, West Bengal– 731345, IN
Source
Indian Science Cruiser, Vol 34, No 3 (2020), Pagination: 23-31Abstract
In drilling, the unwanted material adhered just beyond the hole produced in a workpiece material is known as a burr. In any conventional manufacturing process like drilling, milling, etc., machining burr is produced. There can be usually no conventional machining process which does not form burr. Presence of burr on the workpiece material leads to increasing production time as well as manufacturing cost. Minimization of burr height and thickness by changing machining process parameters and environmental condition yields decreasing production cost. The present work deals with prediction of burr height and burr thickness in the drilling process. An investigation has been performed by changing different process parameters like feed and cutting environment with respect to different drill diameters. From the experimental observation made by different sets of experiments with varying process parameters, minimum burr height and thickness are tried to find out. It is observed that using the back up support of the work material, burr height and thickness could be reduced remarkably. An Artificial Neural Network (ANN) model is developed using the experimental results. The neural network model estimates show close matching with the experimentally obtained results.Keywords
Machining, Drilling, Burr, Estimation, Artificial Neural Network, NN, ANN, Modeling.References
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