# Analysis of Hydrodynamic Joural Bearing Using CFD

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 September 24, 2013, 02:01 Analysis of Hydrodynamic Joural Bearing Using CFD #1 New Member   riphaldo Join Date: Jun 2013 Posts: 3 Rep Power: 11 Hi all, I'm presently working on analyzing the motion of hidrodynamic journal bearing using CFD. I have followed the steps that given in the journals written by C.A. Papadopoulos and G. Descombes. However, it appeared that my results are different from their work. Instead of having the negative pressure at the opposite face of positive pressure, the negative pressure just beside the positive. Are there anything wrong with my boundary condition? I used laminar, isothermal, moving mesh for the journal and stationary wall for bearing shell. I also do not have any experience in using UDF to neglect the negative pressure and define the bearing motion. I would really appreciate your help. Thanks

 October 4, 2013, 11:30 #2 New Member   Dinesh Join Date: Nov 2009 Location: India Posts: 24 Rep Power: 15 Can u send me ur case in detail. I am also working on the same and have got the results similar to Papadopoulos papaer ( pattern is same.). Plz pm me.

 October 26, 2013, 16:31 #3 New Member   riphaldo Join Date: Jun 2013 Posts: 3 Rep Power: 11 Thank you Dinesh for your response. I have sent you my modeling condition. I hope you can help me out.

 October 27, 2013, 18:29 #4 New Member   Dinesh Join Date: Nov 2009 Location: India Posts: 24 Rep Power: 15 i didn't get ur BC,s. repost it.

 October 30, 2013, 00:19 #5 New Member   riphaldo Join Date: Jun 2013 Posts: 3 Rep Power: 11 For boundary condition, the journal is defined as moving wall with determined angular velocity, the bearing and side surfaces are defined as stationary wall with constant temperature (300 K). Therefore, the condition of viscosity alteration by the changes of Temperature can be achieved. However, is it possible to set one of the side surface as the pressure outlet and the other side surface as pressure inlet as written by Papadopoulos in his paper? Beacause I still can not reach the convergence if I set the pressure at that both side surfaces with 0 Pa, it just kept saying that there is the reverse flow on the face. How can I fix this? Last edited by riphaldo; November 2, 2013 at 11:48.

 April 22, 2014, 21:10 Ehl #6 New Member   khosro Join Date: Apr 2014 Posts: 1 Rep Power: 0 Hi all, I'm new to Openfoan, and trying to model Elastohydrodynamics condition for point contact. I guess it should be similar to what you've done. Can you please send me your work so I have an idea how to start the modeling. Thanks.

 Tags bearings, journal, udf, udf and programming, udf code

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