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Hossain, Md Naim
- CFD Analysis of Fish Movement in Open Channel under Laminar Flow Condition
Abstract Views :332 |
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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- Numerical Validation of Flow Boiling Analysis in Ansys Fluent with VOF Approach
Abstract Views :427 |
PDF Views:175
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.References
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