Hi, I am trying to simulate solid-liquid flow in comsol, the geometry of model is 2 cylinders that fluid flows between two cylinders and the cylinder with lower diameter is rotating
You don't need to select the moving mesh. Just select the boundary of the cylinder as 'wall' and specify the wall as moving, then select 'rotating', then put the rotating wall in ' rad/sec'.
Dear Mr Miri,
It is not a big deal at all!
If you have your equation you should just order your equation as coefficient form PDE of COMSOL (Look at documentations for details), and if it was not applicable, it would be better to implement your model in General form.
For good example I suggest you to look at equation branch of a default model from comsol>shape functions, and then compare it with its related equations, they are implemented as general form PDEs.
Sorry, I didn't work with rotated walls and I am not quite familiar with it, but once you've had the equations (I mean PDE) it will be a simple problem.
I don't recall clearly but I think there are some good examples n Model library of COMSOL too.
Wish it helped!
regards
Yes, the modeling of problem can be obtained in the form of partial differential equation on the basis of nature and boundaries of rotation.
You don't need to select the moving mesh. Just select the boundary of the cylinder as 'wall' and specify the wall as moving, then select 'rotating', then put the rotating wall in ' rad/sec'.
Ghassan Fadhil Smaisim
dear Mr Ghassan,
I think there is no place where you can define rotation in COMSOl. could you please clarify how to simulate rotation? just there is something about Sliding Wall where it may help I think.
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