Abstract
Experimental study was performed to investigate X-shaped intersecting flows in multiple diamond-shaped islands. Two kinds of upstream and downstream apex angles in islands were 30° and 60°. Flow control was performed by placing a turbulence mesh at a right side in the front surface of the first-row of diamond-shaped islands. The X-shaped flows in intersecting regions were visualized using the fluorescein dye illuminated by a laser light sheet. The velocity variations in their flow fields were measured using two-dimensional laser Doppler velocimetry (LDV). It is found that the difference of flow patterns depends on the arrangement of the diamond-shaped islands, the Reynolds number, the existence of the turbulence mesh, and row numbers of diamond-shaped islands. The characteristics of velocity variations in the X-shaped intersecting flows are also clarified in each intersecting region of diamond-shaped islands.
