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June 12, 2024, 04:55 |
Steady state run - inner cycle
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#1 |
New Member
Giovanni Bettega
Join Date: Sep 2014
Posts: 26
Rep Power: 12 |
Hello,
A steady state run: TIME_DOMAIN=NO (only inner loops) There is and option in the configuration file: TIME_DISCRE_FLOW which can be 1) EULER_IMPLICIT 2) EULER_EXPLICIT 3) RUNGE_KUTTA_EXPLICIT (In the config template I found % Time discretization (RUNGE-KUTTA_EXPLICIT, EULER_IMPLICIT, EULER_EXPLICIT) TIME_DISCRE_FLOW= EULER_IMPLICIT ) About the explicit options, and in particular about the option 2), is there the possibility of setting directly a "time step" for that explicit approach? Or the "time step" is always local, based on CFL number? Thanks a lot Giovanni Last edited by gbettega; June 12, 2024 at 11:42. |
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June 13, 2024, 17:53 |
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#2 |
Senior Member
bigfoot
Join Date: Dec 2011
Location: Netherlands
Posts: 674
Rep Power: 21 |
We have some examples of unsteady simulations in the testcases folder, for instance the flow a square cylinder in TestCases/Unsteady/square_cylinder, you basically do:
Code:
TIME_DOMAIN = YES TIME_MARCHING= DUAL_TIME_STEPPING-2ND_ORDER TIME_STEP= 0.0015 MAX_TIME= 3.75 % 2500 iterations - 3.75 % 3500 iterations - 5.25 % 5000 iterations - 7.50 % INNER_ITER= 10 |
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June 13, 2024, 19:39 |
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#3 |
New Member
Giovanni Bettega
Join Date: Sep 2014
Posts: 26
Rep Power: 12 |
Thanks
my question was about a steady state run Giovanni |
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Tags |
steady state run, time advancement |
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