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Title: Effect of pore to throat size ratio on interfacial heat transfer coefficient of porous media
Authors: Özgümüş, Türküler
Mobedi, Moghtada
Keywords: Heat transfer
Pore to throat size ratio
Porous media
Navier Stokes equations
Nusselt number
Temperature distribution
Porous materials
Issue Date: Jan-2015
Publisher: The American Society of Mechanical Engineers(ASME)
Source: Özgümüş, T., and Mobedi, M. (2015). Effect of pore to throat size ratio on interfacial heat transfer coefficient of porous media. Journal of Heat Transfer, 137(1). doi:10.1115/1.4028764
Abstract: In this study, the effects of pore to throat size ratio on the interfacial heat transfer coefficient for a periodic porous media containing inline array of rectangular rods are investigated, numerically. The continuity, Navier-Stokes, and energy equations are solved for the representative elementary volume (REV) of the porous media to obtain the microscopic velocity and temperature distributions in the voids between the rods. Based on the obtained microscopic temperature distributions, the interfacial convective heat transfer coefficients and the corresponding Nusselt numbers are computed. The study is performed for pore to throat size ratios between 1.63 and 7.46, porosities from 0.7 to 0.9, and Reynolds numbers between 1 and 100. It is found that in addition to porosity and Reynolds number, the parameter of pore to throat size ratio plays an important role on the heat transfer in porous media. For the low values of pore to throat size ratios (i.e., β = 1.63), Nusselt number increases with porosity while for the high values of pore to throat size ratios (i.e., β = 7.46), the opposite behavior is observed. Based on the obtained numerical results, a correlation for the determination of Nusselt number in terms of porosity, pore to throat size ratio, Reynolds and Prandtl numbers is proposed.
ISSN: 0022-1481
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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