Problem with DES Model of Airfoil in Ground Effect -- CFD Online Discussion Forums

August 18, 2020, 04:50

Problem with DES Model of Airfoil in Ground Effect

d_turner

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Daniel

Join Date: Aug 2020

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Hi all,

I have plotted the turbulent viscosity ratio for a DES of an airfoil in ground effect and have noticed a worrying feature I cannot figure out. The figure attached shows that the regions far from the wall have a higher level of turbulence, before becoming more laminar in the region closer to the airfoil. This is confusing, as I set a very low level or turbulent intensity at the inlet (0.7%). May it be due to poor aspect ratio as the mesh changes near the airfoil? Any help is much appreciated.

Attached Images

DES_turbviscratio_error_0.6AOA8.PNG (188.1 KB, 5 views)

Tags

airfoil, des, fluent, mesh, turbulent viscosity ratio

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