Evaluation of cooling performance of multi small-axial fans using LES

Abstract

Since a fan cooling for electronic devices is conventionally used, it is important to understand the flow phenomena in order to achieve efficient cooling performance. In this study, we investigate the heat-flow characteristics of around a single and two small-axial fans under the influence of varied the distance between centers of two fans over the parallel-plate having a heating wall using LES (large eddy simulation). An IB (Immersed Boundary) method is introduced to reproduce the impingement wall, small-axial fans and casings. We analyze the unsteady flow and heat transfer in a wake of the fans.