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

Shiang Wuu Perng; Horng Wen Wu; Tswen Chyuan Jue

doi:10.1016/j.ijheatmasstransfer.2012.02.037

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

Shiang Wuu Perng, Horng Wen Wu, Tswen Chyuan Jue

Department of Systems and Naval Mechatronic Engineering

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 ^-3 or 10 ^-4, 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.

Original language	English
Pages (from-to)	3121-3137
Number of pages	17
Journal	International Journal of Heat and Mass Transfer
Volume	55
Issue number	11-12
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2012.02.037
Publication status	Published - 2012 May 1

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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abstract = "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 -3 or 10 -4, 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.",

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