{"id":371607,"date":"2024-07-12T09:14:14","date_gmt":"2024-07-12T09:14:14","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-condition-definition\/"},"modified":"2024-07-12T09:15:52","modified_gmt":"2024-07-12T09:15:52","slug":"boundary-condition-definition","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-condition-definition\/","title":{"rendered":"Boundary Condition Definition"},"content":{"rendered":"

Hi all, i want to perform an analysis of air recirculation and determine the percentage of dirty air that enters the intake duct (forcing fan system, 2 ducts). I am having difficulty defining the boundary condition for the intake forcing duct so that it can draw air from velocity inlet tunnel 1 and 2 as shown in the picture.<\/p>\n

For the time being, I have tried to define the front part of the duct as the “fan” boundary condition and set a constant speed of 19.6 m\/s. However, when generating the report, why does the duct not showing any air velocity? As can be seen in velocity contour 1 (blue contour).<\/p>\n

Also in the streamline report, it can be seen that the forcing duct is not drawing any air at all.<\/p>\n

What is the problem? can someone help me step by step to fix it?<\/p>\n

Thank you,<\/p>\n

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