F211 多孔質角柱まわりの熱流動特性(OS-6:多孔質の最近の進展(2))

概要

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Unsteady two-dimensional numerical study has been done for the forced convection around the porous rectangular cylinder which has heat generation. If aspect ratio of the porous rectangular cylinder is relatively small, flow entering from the front of the cylinder flows out from the rear of the cylinder and suppresses the generation of the Karman vortices, reduces the pressure drop behind the cylinder. Here the drag coefficient is smaller than that of impermeable solid cylinder. When aspect ratio is relatively large, the permeating flow drains from the side before it reaches the rear and the pressure drop of the wake is not suppressed. Here the drag coefficient may be larger than that of solid cylinder because the internal friction becomes dominant. Heat transfer characteristic around the porous cylinder is strongly affected by the permeating flow.
2011-10-28