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jrrygg October 26, 2012 04:38

Rotor-Stator with separate imported meshes

I am currently working on simulating the flow in a Pelton turbine, and have already created and run a simulation in Ansys CFX. I aim to convert this to an OpenFOAM case to be able to compare the quality of the results.

I am not that experienced with OpenFOAM, at least not with this type of complex case, and I hope to get some tips on how to approach this.

First of all, is this doable, or am I aiming to high?

I believe the solver I should use is pimpleDyMFoam. I am struggling to see how I can combine my two meshes (stationary and rotating) in OpenFOAM.

Short description of setup:
-Stationary mesh, imported from Ansys. Domain and water inlet (jet)
-Rotating mesh (should I import this to the same folder case?). Consisting of domain and three buckets.
-Both meshes have a sliding interface.
-Rotating mesh should only rotate enough so that all three buckets have had a fully developed jet (<180 degrees)

I got the mesh merged by mergeMeshes and it looks fine. However, as I will have a two-phase flow (water jet and air in the same domain) I will probably have to use another solver. I'm guessing interDyMFoam might do the trick?

hjasak October 27, 2012 07:55

Just saw your post - mergeMeshes is the correct answer. :)


jrrygg October 29, 2012 08:04


Thank you for your reply!

Any idea regarding which solver I should use? The case is multiphase, moving mesh and transient.



sail October 29, 2012 10:01

you guessed right, interDyMFoam is waht you are looking for.

jrrygg October 29, 2012 10:42


Originally Posted by sail (Post 389094)
you guessed right, interDyMFoam is waht you are looking for.

Thank you very much!

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