[gbettega]

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

[bigfootedrockmidget]

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:

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

[gbettega]

Thanks
my question was about a steady state run
Giovanni