NDLI: Numerical Study of Heat Transfer in Turbulent Cross-Flow Over Porous-Coated Cylinder

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Rahmati, N. Mansoori, Z. Saffar-Avval, M. Ahmadi, G.
Copyright Year	2017
Abstract	In the present paper, a numerical study has been conducted to investigate the heat transfer from a constant temperature cylinder covered with metal foam. The cylinder is placed horizontally and is subjected to a constant mean cross-flow in turbulent regime. The Reynolds Averaged Navier-Stokes (RANS) and Darcy-Brinkman-Forchheimer equations are combined and used for flow analysis. The energy equation used assumes local thermal equilibrium between fluid and solid phases in porous media. The k-ω SST turbulence model is used to evaluate the eddy viscosity that is implemented in the momentum and energy equations. The flow in the metal foam (porous media) is in laminar regime. Governing equations are solved using the finite volume SIMPLEC algorithm. The effect of thermophysical properties of metal foam such as porosity and permeability on the Nusselt number is investigated. The results showed that using a metal porous layer with low porosity and high Darcy number in high Reynolds number turbulent flows markedly increases heat transfer rates. The corresponding increase in the Nusselt number is as high as 10 times that of a bare tube without the metal foam.
Sponsorship	Fluids Engineering Division
File Format	PDF
ISBN	9780791858042
DOI	10.1115/FEDSM2017-69582
Volume Number	Volume 1A, Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery
Conference Proceedings	ASME 2017 Fluids Engineering Division Summer Meeting
Language	English
Publisher Date	2017-07-30
Publisher Place	Waikoloa, Hawaii, USA
Access Restriction	Subscribed
Subject Keyword	Metal foams Viscosity Turbulence Temperature Porous materials Metals Reynolds number Momentum Permeability Flow (dynamics) Thermal equilibrium Fluids Cross-flow Algorithms Reynolds-averaged navier–stokes equations Eddies (fluid dynamics) Porosity Heat transfer Cylinders
Content Type	Text
Resource Type	Article

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