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-   -   Fluent Tui Command for transient (http://www.cfd-online.com/Forums/fluent/116417-fluent-tui-command-transient.html)

MachZero April 18, 2013 11:47

Fluent Tui Command for transient
 
Hello All,

I have found the fluent tui guide somewhat difficult to use because it often tells you what a command does, but not the subsequent path to get there. I searched through this guide and have not found how to transition a simulation from steady state to transient. This is important for initializing when using the automated parameterization. Has anyone come across this?

Thanks in advance!

billwangard April 19, 2013 16:05

TUI code to set transient solver
 
;; To turn on unsteady first order
/define models unsteady-1st-order? yes

;; To turn on unsteady 2nd order
/define models unsteady-2nd-order? yes

;; To turn on steady-state solver
/define models steady? yes

;; To iterate with steady state solver (10 iterations)
(iterate 10)

;; To iterate with unsteady solver (10 time steps, with 20 maximum iterations per time step)
(physical-time-steps 10 20)

Hope this helps,
Bill Wangard, Ph.D.
Engrana LLC

MachZero April 20, 2013 14:16

Thanks!
 
That is extremely helpful! Thank you very much. I am so very glad we have an active and helpful community

macfly April 20, 2013 15:07

Quote:

Originally Posted by billwangard (Post 421825)
;; To iterate with unsteady solver (10 time steps, with 20 maximum iterations per time step)
(physical-time-steps 10 20)

Where the hell does that come from? Ok, I found, scheme commands : http://www.polo.ufsc.br/~tiagom/docu...programing.pdf

For a reason that I ignore, the command 'dual-time-iterate' doesn't work when I open a transient case, load data and try to iterate further. Nothing happens. Is this a bug? Thanks.

blackmask April 20, 2013 23:48

Use
/solve/iterate 200
/solve/dual-time-iterate 200 20
instead. I have never been able to appreciate the merits of LISP.


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