Numerical investigation of heat transfer enhancement on a porous vortex-generator applied to a block-heated channel

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• 作者：Shiang-Wuu Perng^a ; ^b ; Horng-Wen Wu^c ; ^{z7708033@email.ncku.edu.tw} ; Tswen-Chyuan Jue^d
• 关键词：Vortex-induced vibration ; Heat transfer enhancement ; Porous vortex-generator
• 刊名：International Journal of Heat and Mass Transfer
• 出版年：2012
• 期刊代码：42_00179310
• 类别：ce
• 出版时间：May, 2012
• 卷：55
• 期：11-12
• 页码：3121-3137
• 文件大小：4455 K

摘要

The numerical simulation is used to obtain the unsteady laminar flow and convective heat transfer in the block-heated channel with the porous vortex-generator. The general Darcy-Brinkman-Forchheimer model is adopted for the porous vortex-generator. The parameters studies including porosity, Darcy number, width-to-height ratio of porous vortex-generator and Reynolds number have been explored on heat transfer enhancement and vortex-induced vibration in detail. The results indicate that heat transfer enhancement and vortex-induced vibration increase with increasing Reynolds number and width-to-height ratio. However, the porosity has slight influence on heat transfer enhancement and vortex-induced vibration. When Darcy number is 10^鈭? or 10^鈭?, installing a porous vortex-generator with B/h = 1.0 improves overall heat transfer the best along heated blocks, and has a strong reduction of vortex-induced vibration.