Radial Fan (MRF/RBM). Problem with Rigid Body Motion -RBM -- CFD Online Discussion Forums

February 28, 2021, 06:19	Radial Fan (MRF/RBM). Problem with Rigid Body Motion -RBM	#1
Karen Martirosyan New Member Deutschland Join Date: Sep 2020 Posts: 11 Rep Power: 6	Hello guys, i simulate the fan behaviour of Moving Reference Frame MRF ("Frozen Rotor") and Rigid Body Motion RBM (Unsteady RANS).I have a problem with RBM.I got too much differential pressure.I thought the problem was with Geometry, but I made many changes to Geometry, but still nothing. There Are Physics for 3 Regions-Housing/Inlet/Rotor. Properties Region Housing-Physics Values-Motion Specification --- //Stationary/ReferenceFrame for Rotation// Region Inlet-Physics Values-Motion Specification ---- Stationary/ReferenceFrame for Rotation// Region Rotor-Physics Values-Motion Specification ---//Rotation/LAbFrame for Rotation// how i know the Region of Housing and of Inlet are Stationary and for that the Reference Frame must be Reference Frame for Rotation. But if i change only in Housing Region the Reference Frame for Rotation to LabFrame for Rotation , i get a perfect solution. is it correct? maybe you could help me ,i have a few days to find the reason . Thank you

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