How to access or generate double derivatives?

March 10, 2006, 22:44

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, 21:15

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, 22:44	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, 21:15	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!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Continuing User Defined Real Gas Model issues	aeroman	FLUENT	6	April 8, 2016 03:34
New densitybased solver AeroFoam	giulio_romanelli	OpenFOAM Running, Solving & CFD	48	January 15, 2016 08:20
Parallel User Defined Real Gas Model	aeroman	FLUENT	4	July 1, 2015 06:09
Missing math.h header	Travis	FLUENT	4	January 15, 2009 11:48
REAL GAS UDF	brian	FLUENT	6	September 11, 2006 08:23