Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
658911 | International Journal of Heat and Mass Transfer | 2012 | 16 Pages |
Abstract
The present study deals with numerical simulation of fully developed flow and heat transfer through a wavy surface described by the function y = 2a sin2(Ïx/L). Finite volume method on collocated grid is used to solve incompressible, time-dependent Navier-Stokes and energy equation in primitive variable form. Effect of geometry, generated by varying Hmin/Hmax ratio from 0.1 to 0.5 and keeping L/a ratio fixed to 8, on fluid flow and heat transfer characteristics has been elaborated at a Reynolds number of 600. The critical Reynolds number of unsteadiness is found to depend on the geometrical parameters. At Re = 600, one model shows the flow with multiple frequencies while the others reveal single frequency. It is established that geometry with Hmin/Hmax ratio 0.2 produces the highest Nusselt number and spawns the best thermal performance factor (TPF). With increase in Reynolds number, the steady flow shows a decrease in TPF while an increase in TPF is noticed when the flow is unsteady.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Abhishek G. Ramgadia, Arun K. Saha,