bubble deformation in flow

mahdinili · October 17, 2011, 13:31

Dear All

I have a problem in modeling of a bubble deformation in a air flow at CFX. During the shape deformation of the bubble, the surface becomes distorted and zigzag and so, the solution diverges. I want to smooth the bubble surface during the shape deformation of bubble by a function in CFX. Is there any smoothing function to damp the zigzag on the bubble surface?

ghorrocks · October 17, 2011, 18:20

Yes, have a look at the free surface smoothing options and other free surface parameters. I remember seeing exactly this effect a while ago and it took a while to find the parameter to fix it - and I have since forgotten what it is (sorry!) so you are going to have to hunt through them and find it yourself.

October 17, 2011, 13:31	bubble deformation in flow	#1
mahdinili New Member mahdi Join Date: Sep 2011 Location: Iraq Posts: 7 Rep Power: 15	Dear All I have a problem in modeling of a bubble deformation in a air flow at CFX. During the shape deformation of the bubble, the surface becomes distorted and zigzag and so, the solution diverges. I want to smooth the bubble surface during the shape deformation of bubble by a function in CFX. Is there any smoothing function to damp the zigzag on the bubble surface?

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October 17, 2011, 18:20		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Yes, have a look at the free surface smoothing options and other free surface parameters. I remember seeing exactly this effect a while ago and it took a while to find the parameter to fix it - and I have since forgotten what it is (sorry!) so you are going to have to hunt through them and find it yourself.