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Old   June 20, 2014, 09:16
Default Problem with stirred mixing tank
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amine
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Hi

You can see in attached picture that I have a probleme with water velocity

Can anyone help me de resolve this problem ?

I used MRF and k-e RNG approach
W= 100 rpm
material: water
solver: SIMPLE
Meshing : non conformal patch (see picture)
Attached Images
File Type: jpg PV.jpg (26.2 KB, 11 views)
File Type: png pales_maillage_7.png (49.2 KB, 12 views)
File Type: png pales_maillage_8.png (52.4 KB, 10 views)
File Type: png pales_maillage_3.png (49.5 KB, 9 views)
File Type: png pales_maillage_6.png (37.9 KB, 9 views)
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Old   June 20, 2014, 10:29
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Problem are solved
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Old   June 20, 2014, 10:31
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Sun
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Hi,
A few suggestions:
try k-e standard, slice your geometry at the bottom part, I believe you can get hex elements for the Rushton blades and try different dimensions for the rotational zones

And a couple of questions:
What component of the velocity is the first contour?
Could you please attach the contour plot of axial velocity in a vertical plane (xy in your geometry)
Please include the number of cells and the mesh quality in your reply.
Overall, I think the mesh is causing all the troubles. To me it looks kinda coarse, especially where the top rotational zone touches the rest of the tank.
Cheers!
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