Thermohydraulic Transport Characteristics of Micro Mixer in Micro Channel

Abstract

This particular study consists of computational analysis based on transfer of heat and fluid flow characteristic of air with Pr = 0.7 through a 2-D micro-channel of an isothermal-fluxed wall of a circular shape micro mixer. In particular, a simulatory model has been established using computational fluid dynamics (CFD), i.e., Ansys Fluent 14.5 to investigate such effect. The formulations are done by the laminar flow model, since the flow is assumed to be laminar. The simulation is conducted for gaining an insight and understanding the physical behaviour of the thermal and fluid flow of air in the micro channel with built-in circular shape micro mixer under constant the conditions of isothermal wall. The configuration parameters include the, circular diameter (d) and pitch (p). Reynolds number varies from 10 to 800 in this particular study. A 2-D non-uniform grid was generated, in order to critically examine the flow and heat transfer. The effects of Reynolds number, Nusselt number, friction factor, temperature ratio of modified case to base case, are examined and discussed. All micro mixers at different pitch and diameter have good, tempature ratio of modified case to base case, which are greater than unity. It is highly possible to be implemented in the practical application like micro channel heat sink.