Abstract
This study provides distinct and complementary information regarding laminar flow through and around porous bluff bodies. For low permeable cases, the recirculating wake behind a thinner disk is longer than that behind a thicker disk; while the opposite trend is observed for high permeable cases. The bifurcation diagrams for wake-existence can be collapsed on roughly the same curve when varying with Darcy number (Da) modified by the aspect ratio, which are also observed for the drag coefficient and the flow rate at the rear surface of the disk. The aspect ratio does not have large effects on the vorticity accumulation and the vorticity decay rate for fixed Reynolds number and Da.
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