CFX-Solver

sainath.s@tdps.co.in · July 4, 2012, 07:27

There is no issue with the solver just that it is diverging. Just set you reference pressure on the higher side to your reality conditions(>20 MPa) and set opening relative pressures to zero.

Also have you checked the direction of rotation of your gears????? Why dont you try starting your problem under steady state conditions and then move on to your transient conditions.

shanxuewenjdx · July 15, 2012, 22:05

It‘s the issue of mesh,for mesh quality of the domain is below 0.3.

Thanks all !

shanxuewenjdx · July 15, 2012, 22:08

But this simulation is not basically consistant with the experiment.
In the first picture,this groove doman is connected with fluid domain with the method of "Domain Interface".

shanxuewenjdx · August 12, 2012, 22:26

Hello，Still a question about my simulation? I suppose the unreal pressure picture above is due to leakage. So is there anyone who has familiar experience with gear pump? Since the massFlow at outlet is not consistant with the actual situation, what's the reason ?And what can be done?
Many thanks.

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July 4, 2012, 07:27		#41
sainath.s@tdps.co.in New Member Sainath Join Date: Mar 2012 Posts: 27 Rep Power: 14	There is no issue with the solver just that it is diverging. Just set you reference pressure on the higher side to your reality conditions(>20 MPa) and set opening relative pressures to zero. Also have you checked the direction of rotation of your gears????? Why dont you try starting your problem under steady state conditions and then move on to your transient conditions.

July 15, 2012, 22:08		#43
shanxuewenjdx Member Stefan Join Date: May 2012 Posts: 49 Rep Power: 14	But this simulation is not basically consistant with the experiment. In the first picture,this groove doman is connected with fluid domain with the method of "Domain Interface".

August 12, 2012, 22:26		#44
shanxuewenjdx Member Stefan Join Date: May 2012 Posts: 49 Rep Power: 14	Hello，Still a question about my simulation? I suppose the unreal pressure picture above is due to leakage. So is there anyone who has familiar experience with gear pump? Since the massFlow at outlet is not consistant with the actual situation, what's the reason ?And what can be done? Many thanks.