How to access or generate double derivatives?

March 10, 2006, 23:44

Hi, Can somebody please tell me how to access or specify (at the boundary) second order derivatives of velocity components, concentration in Fluent? Is it ok to define a UDS equal to first order derivative and then store the the gradient of this UDS in some UDM? Will this method work? Or is there any other way out? Thanks & Regards, Vishal

March 11, 2006, 22:15

Search this forum for "second derivative" and you could find a lot of discussions about this. Someone suggested that you could use finite difference formula to calculate these derivatives. Good luck!

March 10, 2006, 23:44	How to access or generate double derivatives?	#1
Vishal Guest Posts: n/a	Hi, Can somebody please tell me how to access or specify (at the boundary) second order derivatives of velocity components, concentration in Fluent? Is it ok to define a UDS equal to first order derivative and then store the the gradient of this UDS in some UDM? Will this method work? Or is there any other way out? Thanks & Regards, Vishal

March 11, 2006, 22:15	Re: How to access or generate double derivatives?	#2
Lucy Guest Posts: n/a	Search this forum for "second derivative" and you could find a lot of discussions about this. Someone suggested that you could use finite difference formula to calculate these derivatives. Good luck!

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