Dynamic mesh UDF problem

November 9, 2007, 05:58

Hi All,

I am writing a UDF to move the mesh for a pump simulation by repozitioning the nodes of the moving zone. When my UDF loops through the surfaces and the nodes of the moving zone, there are nodes which called and repozitiond twice within a time step. How can I flag the nodes to be called only once in a time step? Can anybody advice something?

Thanx, Peter

November 9, 2007, 11:19

could you please show us the code, then we may help.

November 12, 2007, 03:10

Unfortunately I cannot place my code here, because that is contrary with the secrecy rules of my firm.

I tryed the NEW_FLAG, NODE_MARK, and NODE_POS_NEED_UPDATE, NODE_POS_UPDATED commands, but they do not work properly. Or the way as I am trying to use it wrong.

If someone has any idea please write!

Thanks, Peter

November 9, 2007, 05:58	Dynamic mesh UDF problem	#1
Peter Guest Posts: n/a	Hi All, I am writing a UDF to move the mesh for a pump simulation by repozitioning the nodes of the moving zone. When my UDF loops through the surfaces and the nodes of the moving zone, there are nodes which called and repozitiond twice within a time step. How can I flag the nodes to be called only once in a time step? Can anybody advice something? Thanx, Peter

November 9, 2007, 11:19	Re: Dynamic mesh UDF problem	#2
winter Guest Posts: n/a	could you please show us the code, then we may help.

November 12, 2007, 03:10	Re: Dynamic mesh UDF problem	#3
Peter Guest Posts: n/a	Unfortunately I cannot place my code here, because that is contrary with the secrecy rules of my firm. I tryed the NEW_FLAG, NODE_MARK, and NODE_POS_NEED_UPDATE, NODE_POS_UPDATED commands, but they do not work properly. Or the way as I am trying to use it wrong. If someone has any idea please write! Thanks, Peter

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