Force as boundary condition

February 20, 2007, 07:09

I would like to ask how is it possible to set a constant axial force of 400 N on a boundary that has a type of a wall

Thank you

February 20, 2007, 15:58

Hi,

You might be able to do this using a moving mesh linked to a CEL function which evaluates the force on the wall and moves the wall to get the desired force. Setting it up should be straight forward but I suspect you will have problems getting it to behave numerically as you will have to tune the wall motion to converge on the desired force in a stable fashion.

Glenn Horrocks

February 21, 2007, 03:35

You mean something similar with the moving mesh tutorial? which simulates a ball valve I think

Thanks a lot for your advice

February 21, 2007, 16:13

Hi,

Yes, similar to that tutorial. Get the force on the body and adjust the position of the wall until you get the force you want.

Glenn Horrocks

February 20, 2007, 07:09	Force as boundary condition	#1
Nicolas Guest Posts: n/a	I would like to ask how is it possible to set a constant axial force of 400 N on a boundary that has a type of a wall Thank you

February 20, 2007, 15:58	Re: Force as boundary condition	#2
Glenn Horrocks Guest Posts: n/a	Hi, You might be able to do this using a moving mesh linked to a CEL function which evaluates the force on the wall and moves the wall to get the desired force. Setting it up should be straight forward but I suspect you will have problems getting it to behave numerically as you will have to tune the wall motion to converge on the desired force in a stable fashion. Glenn Horrocks

February 21, 2007, 03:35	Re: Force as boundary condition	#3
Nicolas Guest Posts: n/a	You mean something similar with the moving mesh tutorial? which simulates a ball valve I think Thanks a lot for your advice

February 21, 2007, 16:13	Re: Force as boundary condition	#4
Glenn Horrocks Guest Posts: n/a	Hi, Yes, similar to that tutorial. Get the force on the body and adjust the position of the wall until you get the force you want. Glenn Horrocks

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