How to add the second gradient of UDS

September 3, 2003, 13:26

Hi,everybody How to add the second gradient of UDS(user defined scalar) into species equation as source terms. Thanks. I only find the macro in fluent to calculate the first gradient. By the way, is there any way to get the arrangment or distribution of cells in fluent? Thanks.

September 4, 2003, 06:32

I think you could try to assigne the value of the first gradient to a new UDS (for which you won't solve the transport equation), evaluate the first gradient of this UDS (i.e. the second one of your original UDS) and use it in the source term.

Let me know if you think it can work.

Regards,

Ale

September 3, 2003, 13:26	How to add the second gradient of UDS	#1
zhou Guest Posts: n/a	Hi,everybody How to add the second gradient of UDS(user defined scalar) into species equation as source terms. Thanks. I only find the macro in fluent to calculate the first gradient. By the way, is there any way to get the arrangment or distribution of cells in fluent? Thanks.

September 4, 2003, 06:32	Re: How to add the second gradient of UDS	#2
Ale Guest Posts: n/a	I think you could try to assigne the value of the first gradient to a new UDS (for which you won't solve the transport equation), evaluate the first gradient of this UDS (i.e. the second one of your original UDS) and use it in the source term. Let me know if you think it can work. Regards, Ale

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Gradient of UDS	gemini	Fluent UDF and Scheme Programming	2	December 24, 2013 01:24
How to compute UDS fourth order gradient	Emma66	FLUENT	1	April 27, 2010 06:44
reconstruction gradient of a UDS	gemini	Fluent UDF and Scheme Programming	0	June 7, 2009 17:03
Gradient UDS	tom	FLUENT	1	April 28, 2006 04:46
Gradient of a UDS	Ilkay	FLUENT	0	March 8, 2000 14:42