How can I use NITA in VOF and UDS (separately)?

DaddySpeleo · April 9, 2012, 19:20

Hi!
My task contains two part.
1. I solve UDS.
2. Then I use obtained data as source term and try to solve task with VOF and NITA.
(and I want to repeat it some times)

But... If I have UDS - of course turned off in EQUATIONS - I got message: "noniterative solver is not available with UDS."

What can I do to fix it?
Of cource I can remove UDS -but then I lose the data.
Best regards...

sbaffini · April 19, 2012, 09:44

According to the tasks you need to accomplish you may consider the use of user defined memories instead. Usually the biggest difficulty is in the computation of gradients which require some additional coding (a Green-Gauss cell based algorithm can be easy to be done). Sometimes (but probably not now), the temperature equation can be used conveniently

DaddySpeleo · April 19, 2012, 13:11

Yes. Now I use UDM and copy data from UDS to UDM, then remove UDS, then solve VOF, then create UDS... And I should do it ten times.

I do not understand the creators of Fluent in this case... but - it is the method to stimulate study of Scheme-programming.

April 9, 2012, 19:20	How can I use NITA in VOF and UDS (separately)?	#1
DaddySpeleo New Member Igor Join Date: Mar 2012 Posts: 13 Rep Power: 14	Hi! My task contains two part. 1. I solve UDS. 2. Then I use obtained data as source term and try to solve task with VOF and NITA. (and I want to repeat it some times) But... If I have UDS - of course turned off in EQUATIONS - I got message: "noniterative solver is not available with UDS." What can I do to fix it? Of cource I can remove UDS -but then I lose the data. Best regards...

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April 19, 2012, 09:44		#2
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,152 Blog Entries: 29 Rep Power: 39	According to the tasks you need to accomplish you may consider the use of user defined memories instead. Usually the biggest difficulty is in the computation of gradients which require some additional coding (a Green-Gauss cell based algorithm can be easy to be done). Sometimes (but probably not now), the temperature equation can be used conveniently

April 19, 2012, 13:11		#3
DaddySpeleo New Member Igor Join Date: Mar 2012 Posts: 13 Rep Power: 14	Yes. Now I use UDM and copy data from UDS to UDM, then remove UDS, then solve VOF, then create UDS... And I should do it ten times. I do not understand the creators of Fluent in this case... but - it is the method to stimulate study of Scheme-programming.