Numerical investigation of heat transfer enhancement on a porous vortex-generator applied to a block-heated channel |
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| Authors: | Shiang-Wuu Perng Horng-Wen Wu Tswen-Chyuan Jue |
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| Affiliation: | 1. Department of Accounting Information, Kun Shan University, No. 949, Da Wan Rd., Yung-Kang City, Tainan Hsien, 710, Taiwan, ROC;2. Department of Mechanical Engineering, Kun Shan University, No. 949, Da Wan Rd., Yung-Kang City, Tainan Hsien, 710, Taiwan, ROC;3. Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan, Taiwan, ROC;4. Department of Vehicle Engineering, National Huwei Institute of Technology, Yunlin, Taiwan, ROC |
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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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