Hi all,
I have recently started working with Comsol. It seems very easy to use and so far I was able to build my model and have the basic physics working. I am trying to build a journal bearing model which gives me a realistic fluid film pressure distribution for different shaft speeds and loads. Using the pressure I would then like to calculate the fluid friction and with that the heat distribution within the bearing.
The journal bearing tutorial was very helpful, however it does not solve gaseous effects such as cavition. Comsol support told me that they are working on that but it will not be available any time soon. There are many ways to simulate journal bearings without calculation cavitation, one is be setting the right boundary conditions such as Reynolds, Gümbel, etc. as explained by Schweizer (Schweizer B., "ALE formulation of Reynolds fluid film equation", 2008).
The question is: How/Where do I set these boundary conditions? By using global equations? I have tried to set up global equations but did not succeed - maybe I did it wrong? I have included the model I am working on. The fluid streamlines and most parts of the pressure seems right.
Can anyone help?
Thanks,
Toan
I have recently started working with Comsol. It seems very easy to use and so far I was able to build my model and have the basic physics working. I am trying to build a journal bearing model which gives me a realistic fluid film pressure distribution for different shaft speeds and loads. Using the pressure I would then like to calculate the fluid friction and with that the heat distribution within the bearing.
The journal bearing tutorial was very helpful, however it does not solve gaseous effects such as cavition. Comsol support told me that they are working on that but it will not be available any time soon. There are many ways to simulate journal bearings without calculation cavitation, one is be setting the right boundary conditions such as Reynolds, Gümbel, etc. as explained by Schweizer (Schweizer B., "ALE formulation of Reynolds fluid film equation", 2008).
The question is: How/Where do I set these boundary conditions? By using global equations? I have tried to set up global equations but did not succeed - maybe I did it wrong? I have included the model I am working on. The fluid streamlines and most parts of the pressure seems right.
Can anyone help?
Thanks,
Toan