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-   -   MRFZones with two rotating zones (http://www.cfd-online.com/Forums/openfoam/73547-mrfzones-two-rotating-zones.html)

chemeng March 11, 2010 00:31

MRFZones with two rotating zones
 
Hello everybody! I have a mixer tank with two impellers in the same axis (0 1 0) at a different high. The solver only recognizes the first rotating zone. My MRFZones file is:
1
(
IMPELLER1ST
{
// Fixed patches (by default they 'move' with the MRF zone)
nonRotatingPatches (SLIPWALL BAFFLE WALL CYCLIC);

origin origin [0 1 0 0 0 0 0] (0 0 0);
axis axis [0 0 0 0 0 0 0] (0 1 0);
omega omega [0 0 -1 0 0 0 0] 10.5;
}
)
2
(
IMPELLER2ND
{
// Fixed patches (by default they 'move' with the MRF zone)
nonRotatingPatches (SLIPWALL BAFFLE WALL CYCLIC);

origin origin [0 1 0 0 0 0 0] (0 0 0);
axis axis [0 0 0 0 0 0 0] (0 1 0);
omega omega [0 0 -1 0 0 0 0] 10.5;
}
)

I have tried to put in the IMPELLER2ND axis (0 -1 0) but it doesnt work. I have tried also a lot of differents forms but no one work.
I hope your suggestions. Thanks in advance!

amgode March 11, 2010 01:57

Could you please post the error also. That would be most helpful...

Try this...constant/MRFZones file:

2
(
IMPELLER1ST
{
// Fixed patches (by default they 'move' with the MRF zone)
nonRotatingPatches (SLIPWALL BAFFLE WALL CYCLIC);

origin origin [0 1 0 0 0 0 0] (0 0 0);
axis axis [0 0 0 0 0 0 0] (0 1 0);
omega omega [0 0 -1 0 0 0 0] 10.5;
}
IMPELLER2ND
{
// Fixed patches (by default they 'move' with the MRF zone)
nonRotatingPatches (SLIPWALL BAFFLE WALL CYCLIC);

origin origin [0 1 0 0 0 0 0] (0 0 0);
axis axis [0 0 0 0 0 0 0] (0 1 0);
omega omega [0 0 -1 0 0 0 0] 10.5;
}
)

Make sure that the the MRF zones are included in the constant/polyMesh/cellZones

Hope this helps !

Regards,

-- Amol

chemeng March 11, 2010 02:10

I dont have any error, It just when I see the results only in the bottom part of the tank the flow field is rotating. In the upper part is static. I have tried the configuration that you have written and it doesnt work.
Any other possibility?

chemeng March 11, 2010 02:15

Ok, problem solved. you were right. I have just try again with your configuration and all is ok, sorry. Thank you very much!!


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