UDF derivative -- CFD Online Discussion Forums

March 30, 2012, 05:51	UDF derivative	#1
libia87 Member anonymous Join Date: Mar 2012 Posts: 45 Rep Power: 14	Hi! how can i write dC/dx in a UDF?? because Fluent don't recognise dCdx, says that is an undeclared variable. C its concentration Thanks!

April 22, 2012, 03:43

chenxizh

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chenxizhong

Join Date: Feb 2012

Posts: 30

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may be you can difine a uds to store the C , get the dC/dx by use C_UDSIG()[0]

Quote:

Originally Posted by libia87

Hi!

how can i write dC/dx in a UDF?? because Fluent don't recognise dCdx, says that is an undeclared variable.

C its concentration

Thanks!

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