C205 ON THE THERMAL BOUNDARY CONDITIONS AT THE INTERFACE BETWEEN A POROUS MEDIUM AND AN IMPERMEABLE WALL(Heat transfer in complex system-2)

概要

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The present work investigates a heat transfer phenomenon at the interface between a porous medium and an impermeable wall. The heat transfer at the interface between the microchannel heat sink, an ideally organized porous medium, and the finite-thickness substrate is examined. It is clarified that the heat flux distribution at the interface is not uniform for the impermeable wall with finite thickness. On the other hand, the first approach based on the energy balance is physically reasonable. In the case of the first approach, an additional boundary condition based on the local thermal equilibrium assumption at the interface is used. This is applicable except for the very thin impermeable wall. Hence, for practical situations, the first approach in combination with the local thermal equilibrium assumption is suggested as an appropriate thermal boundary condition for the interface. Our suggestion is confirmed by the thermal analysis of the sintered porous channel.
一般社団法人日本機械学会の論文
2000-10-01