{"id":378659,"date":"2024-08-14T14:58:04","date_gmt":"2024-08-14T14:58:04","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/378659\/"},"modified":"2024-08-14T14:58:04","modified_gmt":"2024-08-14T14:58:04","slug":"378659","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/378659\/","title":{"rendered":"Reply To: Setting Up MRF Case"},"content":{"rendered":"<p>&lt;p&gt;For instance here, for the impeller can I keep the BC as a stationary wall or do I need to define the wall as &#8220;Moving relative to the adjacent cell zone with 0 RPM&#8221;. Similarly for the side-walls and bottom can I keep the BC as stationary or do I need to define them as &#8220;Moving in the absolute velocity frame with 0 RPM&#8221;.&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" 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