飽和充てん層に設置された壁面温度が周期変動する水平円柱まわりの自然対流

概要

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Unsteady state natural convection around a horizontal cylinder in the saturated-glass-beads packed bed is experimentally and numerically investigated. The outside wall-temperature changes sinusoidally to clarify periodical temperature changes in the packed bed in Darcy and non-Darcy flows. For Darcy flow regions, clear thermally concentrated regions appear periodically in the porous media for rather large periodic time, but they are unclear for non-Darcy flows. This phenomenon is successfully analyzed based on the Forchheimer-Brinkman-Boussinesq model. Also, good agreement is obtained in consideration of the thermal nonequilibrium between particles and surrounding fluids and the channel effects near the cylinder wall with large particles.
一般社団法人日本機械学会の論文
1995-03-25