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Erschienen in:
2008 | OriginalPaper | Buchkapitel
Model and Method to Increase the Thermal Efficiency of Micro-Heat Exchangers for Aerospace Applications
verfasst von : A. Velazquez, J. R. Arias, B. Mendez
Erschienen in: Progress in Industrial Mathematics at ECMI 2006
Verlag: Springer Berlin Heidelberg
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The aim of this study is to test numerically the influence that incompressible flow pulsation has on heat transfer in configurations, such as the backward facing step, that appear in micro-electro mechanical systems (MEMS) and that are not very efficient from the thermal point of view. Two control parameters have been used to increase heat transfer: velocity pulsation frequency and pressure gradient amplitude at the inlet section. The working fluid is water with temperature dependent viscosity and thermal conductivity. The results obtained show that the time averaged Nusselt number grows when using appropriate flow pulsations.