# Flow through hydrostatic bearing

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 July 20, 2020, 06:43 Flow through hydrostatic bearing #1 New Member   Akhil Join Date: Jul 2020 Posts: 3 Rep Power: 2 Hello, I am working on a hydrostatic thrust bearing with a single circular recess. The fluid, ISOVG22 is flowing inside the hydrostatic bearing. I will attach the geometry of the thrust bearing with this email. The fluid is flowing through the inlet at 5m/s, velocity inlet. Circular recess pressure was calculated to be 111300 pa for a 15 mm film thickness. Laminar flow, non-newtonian and in-compressible fluid is assumed. Ambient temperature is neglected. Outlet pressure is 101325 pa. I also want to apply a load of 127.51 N on the top of the bearing surface. A rotational speed of 600rpm is also provided. My end goal is the angular velocity of the fluid in these conditions. Geometry description : inlet radius = 5mm recess radius = 50mm bearing radius = 75mm As per calculation from MATLAB it was found out that maximum radial velocity for this case is 34.91 m/s. I want to simulate and verify this answer on ANSYS Fluent. 3-D model.jpg

 July 20, 2020, 10:02 #2 Senior Member     Alexander Karachun Join Date: Nov 2015 Location: Mykolaiv, Ukraine Posts: 191 Rep Power: 6 So you want someone to make calculations for you? Well, good luck!

 July 20, 2020, 11:49 #3 New Member   Akhil Join Date: Jul 2020 Posts: 3 Rep Power: 2 I don't want anyone to do the calculations. I've already done it. I want someone to suggest me how to apply the load on the bearing surface.

 July 20, 2020, 12:33 #4 Senior Member     Alexander Karachun Join Date: Nov 2015 Location: Mykolaiv, Ukraine Posts: 191 Rep Power: 6 Use Deforming Mesh and 6DOF solver. Or you can vary gap (change CAD geometry) and check force on bearing surface.

 July 23, 2020, 15:58 #5 Senior Member   Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 982 Rep Power: 18 Alexander is correct. You can change the CAD geometry, or use a static mesh deformation in CFD Pre to vary your gap thickness. Use 0 Pa relative pressure on outlet, or make sure you take into account the increased static pressure in your force calculation. Consider using symmetry or axisymmetric in Fluent.