Modal Analysis in CFX

Aashi171185 · January 10, 2019, 04:07

How to do modal analysis of fluid free surface in cfx and can we find out the natural frequencies of fluid due to sloshing in cfx ????

ghorrocks · January 10, 2019, 18:11

CFX cannot do a modal analysis in the frequency domain. I don't know of any CFD code which can, you would have to write it yourself.

If you want to do analysis like this in CFX you would have to do it as a series of transient simulations and work out natural frequencies from that.

Jiricbeng · January 11, 2019, 10:48

I think harmonic acoustics would be a better tool this. You can simulate there sloshing as well to find out natural frequencies of a liquid with free surface.

January 10, 2019, 04:07	Modal Analysis in CFX	#1
Aashi171185 Member Aashi Join Date: Dec 2018 Posts: 43 Rep Power: 7	How to do modal analysis of fluid free surface in cfx and can we find out the natural frequencies of fluid due to sloshing in cfx ????

January 10, 2019, 18:11		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	CFX cannot do a modal analysis in the frequency domain. I don't know of any CFD code which can, you would have to write it yourself. If you want to do analysis like this in CFX you would have to do it as a series of transient simulations and work out natural frequencies from that. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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January 11, 2019, 10:48		#3
Jiricbeng Senior Member Jiri Join Date: Mar 2014 Posts: 221 Rep Power: 13	I think harmonic acoustics would be a better tool this. You can simulate there sloshing as well to find out natural frequencies of a liquid with free surface.