Analysis of chaotic advection on mixing and heat transfer in PEMFC cooling applications

Abstract

This study fouces on improving the mixing and thermal performance of heat-exchangers interated in the bipolar plates of PEMFCs. The current design of the heatexchangers in laminar with a Reynolds number around 200. Velocity profiles and particles trajectories were calculated. In order to analyze the chaotic advection, a simple chaotic geometry has been chosen and lagragian fluid particles tracing and Lliapunov exponent were carried out. Firt of all, By means of these calculations, it is shown by flow field, mixing and heat tranfer is increased significantly due to change of advection mechanism to chaotic advection in the heat exchanger.