Authors: M Odabaee K Hooman H Gurgenci
Publish Date: 2010/10/13
Volume: 86, Issue: 3, Pages: 911-923
Abstract
A numerical study has been conducted to examine the heat transfer from a metal foamwrapped solid cylinder in crossflow Effects of the key parameters including the free stream velocity and characteristics of metal foam such as porosity permeability and form drag coefficient on heat and fluid flow are examined Being a determining factor in pressure drop and heat transfer increment the porous layer thickness is changed systematically to observe that there is an optimum layer thickness beyond which the heat transfer does not improve while the pressure drop continues to increase This has been verified by the application of Bejan’s Intersection of Asymptotes method Results have been compared to those of a finnedtube heat exchanger to observe much higher heat transfer rate with reasonable excess pressure drop leading to a higher area goodness factor for metal foamwrapped cylinder
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