Transverse Thermal Dispersion in Porous Media Under Oscillating Flow
Transverse Thermal Dispersion in Porous Media Under Oscillating Flow
In this study, transverse dispersion thermal conductivity in a porous medium of mono-sized steel balls under oscillating flow has been investigated. Although mode of heat transfer is expected to be convection caused by fluid flow only, conduction and especially dispersion in porous media is very important depending on the solid material, structure and flow medium. The scope of this study is to obtain transverse thermal dispersion conductivity correlations to be used for oscillating flow. For this purpose, a total of 27 sets of heat transfer experiments, each representing a different frequency, flow displacement length and heat input, have been conducted for a porous medium of steel balls of 3 mm in diameters. Considering that the total thermal conductivity is a summation of dispersion conductivity and the medium’s thermal conductivity, effective thermal conductivity is found to be a linear function of Peclet number. Thus, it has been possible to estimate effective thermal conductivity of the medium under oscillating flow by measuring heat flux, fluid velocity and calculating radial temperature gradients
Keywords:
Porous Media, Oscillating Flow heat transfer, dispersion,
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- ISSN: 2146-7390
- Başlangıç: 2011
- Yayıncı: The association of science, education and technology
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