{"id":44018,"date":"2020-05-15T10:50:29","date_gmt":"2020-05-15T10:50:29","guid":{"rendered":"\/forum\/forums\/topic\/use-of-the-standard-wall-functions\/"},"modified":"2020-05-15T10:50:29","modified_gmt":"2020-05-15T10:50:29","slug":"use-of-the-standard-wall-functions","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/use-of-the-standard-wall-functions\/","title":{"rendered":"use of the standard wall functions"},"content":{"rendered":"

Hi all,<\/span>
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\nI’m doing simulations in turbulence by using the Relizable k-eps model with standard wall functions. The goal of my simulation is to detect a temperature profile in my channel and compare it with my experiments.
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\nMy concern is if it is ok to use the wall standard functions. By looking at the web, they suggest to use the STANDARD functions when the first cell adjacent to the wall(yplus > 30). The log law is in fact applied when yplus is > 30. From the manual of Ansys, it is explained that when yplus is greater than 11.125 the log law is applied, but it is important to have a yplus greater than 30 to not have a deterioration of the log law. In the case the yplus is lower than 11.125, Ansys applies the laminar stress strain-relation (u*=y*), as said in the manual of Ansys. Now, in my case, the yplus is in the order of one. Then, according to Ansys, the laminar stress-relation is applied. My doubts are:<\/span><\/p>\n