Turbulent Heat Transfer and Fluid Flow over Complex Geometry Fins

Abstract:

In this work, we presented a numerical contribution to numerically evaluate the thermal transfer improvement from forcing a 2D flow of air through a baffled channel. Two complex geometry fins were inserted in the flow field to force recirculation zones to augment mixing and thus, the thermal transfer. The dynamic thermo-energy behavior of air is shown for Re numbers ranging from 12 × 10³ to 32 × 10³. The governing equations, employed to simulate the turbulent forced-convection airflow in the domain under investigation, were solved using the finite volume method, by means of CFD FLUENT, based on the SIMPLEC algorithm. For using the complex geometry fins, the augmentations in Nusselt number and friction factor are in the range of 194.108 - 387.322 % and 476.779 - 2603.667 % over the smooth channel with no fin, respectively. In addition, the use of complex geometry fins with Re = 32 × 10³ gives higher TEF than that with Re = 17,000, 22,000, and 27,000 around 12.072 %, 8.568 %, 5.189 %, and 2.389 %, respectively.

• Periodical: Defect and Diffusion Forum (Volume 388)
• Pages: 378-393
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.388.378
• Online since: October 2018
• Authors: Younes Menni, Ahmed Azzi, Ali Jawad Chamkha*
• Keywords: Complex Geometry Fins, Computational Fluid, Fluid Dynamics, Fluid Mechanics, Heat Exchangers, Numerical Heat Transfer, Rectangular Channels

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