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http://dx.doi.org/10.3795/KSME-B.2005.29.2.189

Numerical Simulation of Natural Convection in a Horizontal Enclosure with a Conducting Square Body  

Lee Jae Ryong (부산대학교 대학원 기계공학과)
Ha Man Yeong (부산대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.2, 2005 , pp. 189-196 More about this Journal
Abstract
The physical model considered here is a horizontal layer of fluid heated below and cold above with a conducting body placed at the center of the layer. The body has dimensionless thermal conductivities to the fluid of 0.1, 1 and 50. Two-dimensional solution for unsteady natural convection is obtained using an accurate and efficient Chebyshev spectral methodology for different Rayleigh numbers. Multi-domain technique is used to handle a square-shaped conducting body. The results for the case of a conducting body are also compared to those of adiabatic and neutral isothermal bodies. When the dimensionless thermal conductivity is 0.1, a pattern of fluid flow and isotherms and the corresponding time-averaged surface Nusselt number are almost the same as the case of an adiabatic body. When the dimensionless thermal conductivity is 50, a pattern of flow and isotherm and the corresponding surface and time-averaged Nusselt number are similar to those of neutral body. The results for the case of dimensionless thermal conductivity of unity are also compared to those of pure natural convection.
Keywords
Natural Convection; Conjugate Heat Transfer; Thermal Conductivity; Numerical Simulation;
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