Numerical Simulation of Heat Transfer in Microchannel with Twisted Tape Insert

Abstract

A 3D microchannel in transient condition with hydro dynamically fully developed was investigated. The main aim to increase the turbulence of fluid with a helical twisted tape insert and compare with the channel without twisted tape. Since the more the turbulence in fluid more the convective heat transfer. A commercial CFD package is used for investigation. An isothermal wall condition with Re equal to 100 which is equal to inlet velocity of 0.67m/s is taken as boundary condition. The main aim is to compare the heat transfer rate, axial wall shear stress, skin friction coefficient, Nusselt number, wall fluxes and heat transfer coefficient for the channel with twisted tape with respect to the without twisted tape. It is found that the increase in turbulence occurs in microchannel due to the twisted tape insert. Also it is found that heat transfer characteristics like axial wall shear stress, skin friction coefficient, surface nusselt number and surface heat transfer coefficient are greater in with twisted tape with respect to without twisted tape.