Turbulent flow and heat transfer enhancement of mixed convection over heated blocks in a channel

Horng Wen Wu, Shiang Wuu Perng

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

Purpose - To investigate the heat transfer enhancement performed by installing a rectangular plate turbulator for internal flow modification induced by vortex shedding. Design/methodology/approach - The large eddy simulation (LES) and SIMPLE-C method coupled with preconditioned conjugate gradient methods have been applied to the turbulent flow field and heat transfer enhancement of mixed convection in a block-heated channel. Findings - Provides information about heat transfer performance indicating that heat transfer performance can be affected by various width-to-height ratio of turbulator and Grasehof numbers with a constant Reynolds number. The results show that the installation of turbulator in cross-flow above an upstream block can effectively enhance the heat transfer performance by suitable width-to-height ratio of turbulator and Grasehof numbers. Research limitations/implications - It is limited to two-dimensional mean flow for the turbulent vortex-shedding flow past a long square cylinder. Practical implications - A very useful source of information and favorable advice for people developing heat transfer enhancement for electronic devices. Originality/value - The results of this study may be of interest to engineers attempting to develop thermal control of electronic devices and to researchers interested in the turbulent flow-modification aspects of heat transfer enhancement of mixed convection in a vertical channel.

原文English
頁(從 - 到)205-225
頁數21
期刊International Journal of Numerical Methods for Heat and Fluid Flow
15
發行號2
DOIs
出版狀態Published - 2005

All Science Journal Classification (ASJC) codes

  • 材料力學
  • 機械工業
  • 電腦科學應用
  • 應用數學

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