{"id":45303,"date":"2020-06-19T20:28:28","date_gmt":"2020-06-19T20:28:28","guid":{"rendered":"\/forum\/forums\/topic\/boundary-layer-mesh\/"},"modified":"2020-06-19T20:28:28","modified_gmt":"2020-06-19T20:28:28","slug":"boundary-layer-mesh","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-layer-mesh\/","title":{"rendered":"Boundary layer mesh"},"content":{"rendered":"

Hi,<\/p>\n

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I am trying to generate a sweep mesh for a wing configuration with flaps and slat in a wind tunnel and having trouble with inflation mesh for the boundary layer. The wing geometry is created by extruding the airfoil shape in the z-direction. The computational domain is created by a “Boolean subtract” operation of the wing from a box (created using primitive shapes). <\/p>\n

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Since I am using a sweep mesh, I set the source face used for sweep as the scoping geometry for inflation and the boundary for inflation as the edges of the airfoil.  I would like to get a y+ value of 0.5. So, I set the inflation option as “first layer thickness” and set the “first layer height” as 6.0E-06 m (based on flat plate analysis).  I also defined a parameter for the wing rotation based on the angle of attack.  For some angle of attacks, it generated very good meshes. However, for some angle of attacks, it created arbitrary mesh crossings in the middle of the boundary layer mesh, where there is not much change in the geometry (see the attached images) and didn’t complete mesh generation.<\/p>\n

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I tried different growth rates, smoothing levels, number of layers, etc.  None of them seems to help.  Any suggestions to fix this issue will be greatly appreciated. The surface on which I am generating the boundary layer mesh is planar, since it is created from a primitive shape (box), and the wing is an extruded shape. I am using Ansys Version 2020 R1.<\/p>\n

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Thank you.<\/span><\/p>\n

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\"\"<\/span><\/p>\n","protected":false},"template":"","class_list":["post-45303","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t