Body force in CFX

enghamed · November 25, 2010, 02:42

Hi,
I want to model tank slosing in ansys cfx 12.1
How should I apply the body force to excite the flow?

Regards;

ghorrocks · November 25, 2010, 07:51

What body force?

Tank sloshing is usually modelled either by moving the gravity vector, or using a moving mesh to move the model to follow the sloshing motion. Should be no need to specify body forces.

enghamed · November 25, 2010, 19:09

thx for the reply

thats exactly what i need.
how can i change the gravity vector?
and for the complex version how can the mesh be moved?

regards for your help

ghorrocks · November 27, 2010, 05:28

For moving gravity vector: Instead of using a constant value for gravity use a CEL expression as a function of time.

For moving mesh: Do the moving mesh tutorials.

November 25, 2010, 02:42	Body force in CFX	#1
enghamed Member Hamed Join Date: Jun 2010 Posts: 43 Rep Power: 16	Hi, I want to model tank slosing in ansys cfx 12.1 How should I apply the body force to excite the flow? Regards;

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November 25, 2010, 07:51		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	What body force? Tank sloshing is usually modelled either by moving the gravity vector, or using a moving mesh to move the model to follow the sloshing motion. Should be no need to specify body forces.

November 25, 2010, 19:09		#3
enghamed Member Hamed Join Date: Jun 2010 Posts: 43 Rep Power: 16	thx for the reply thats exactly what i need. how can i change the gravity vector? and for the complex version how can the mesh be moved? regards for your help

November 27, 2010, 05:28		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	For moving gravity vector: Instead of using a constant value for gravity use a CEL expression as a function of time. For moving mesh: Do the moving mesh tutorials.