icoDyMFoam or ...

ali jafari · December 13, 2012, 06:33

hi

I want to solve this problem ( see picture please ) .two blades oscillate with different frequencies. I searched about

1)angularOscillatingDisplacement
2)Moving Mesh
3)MRFSimpleFoam
4)icoDyMFoam
5)....

please help me !!. my main question : what's correct strategy for this case ?(solver-meshing-BC)

mturcios777 · December 13, 2012, 12:36

Does each blade move at a different angular velocity? If the move at the same velocity and direction (and these don't change in time), MRFSimpleFoam should work (as simple is steady state). If you are running 2.1.x, have a look at the propeller case for pimpleDyMFoam for some inspiration, especially if the blades move at different velocities.

ali jafari · December 13, 2012, 13:30

Quote:

Originally Posted by mturcios777

Does each blade move at a different angular velocity? If the move at the same velocity and direction (and these don't change in time), MRFSimpleFoam should work (as simple is steady state). If you are running 2.1.x, have a look at the propeller case for pimpleDyMFoam for some inspiration, especially if the blades move at different velocities.

Thanks . yes , blades move at different angular velocity , I will check your suggestion.

ali jafari · December 19, 2012, 17:03

I check it . but I have new problem with mesh !. I use gambit , I defined blades as a wall but when I converted them to foam (fluentmeshtofoam) they didnt appear in boundary Dic.

blades are edge ! does my mesh need that I change blades to surface ?

December 19, 2012, 17:03	Mesh...	#4
ali jafari Member ali jafari Join Date: Sep 2012 Posts: 50 Rep Power: 13	I check it . but I have new problem with mesh !. I use gambit , I defined blades as a wall but when I converted them to foam (fluentmeshtofoam) they didnt appear in boundary Dic. blades are edge ! does my mesh need that I change blades to surface ? Last edited by ali jafari; December 19, 2012 at 17:22.

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December 13, 2012, 12:36		#2
mturcios777 Senior Member Marco A. Turcios Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 740 Rep Power: 28	Does each blade move at a different angular velocity? If the move at the same velocity and direction (and these don't change in time), MRFSimpleFoam should work (as simple is steady state). If you are running 2.1.x, have a look at the propeller case for pimpleDyMFoam for some inspiration, especially if the blades move at different velocities.