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PISO's strange behavior at different meshes :(

Posted February 25, 2013 at 07:19 by skeptik (CFD notes)

1. mesh quad+tri+3D extruded. at 17 grad most flow around airfoil is laminar

Name:  piso_17_hybrid.jpg
Views: 1156
Size:  16.3 KB

2. mesh only tri+3D extruded. at 15 grad flow behind foil is completely turbulent

Name:  piso15_wake.jpg
Views: 972
Size:  20.6 KB

so this pictures shows that we cannot get proper results for Cx, Cy due to bad prediction of the flow detachment.

try to find a solution, may be OF 2.1 will show better results
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