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pi April 28, 2004 10:10

visualize the initial and/or boundary conditions
 
Dear all, IŽd useful any trick to visualize in post the initial conditions or the BC. In complex geometries it is easy to make mistakes or do not set the right (physically right)ones in corners, for example. How do you do it(if you do)?

thanks pi

Gloria Gaynor April 28, 2004 12:15

Re: visualize the initial and/or boundary conditio
 
Try to set the following expert parameters:
solve fluids = f solve tke eps = f
This will turn off the equation solver (assuming you're using k-epsilon model). Run for 1 iteration only and you'll be able to see your initial conditions. Take a look at the CFX-5/etc/5.6/RULES file and you'll find the suitable expert parameters to turn off the equations for your specific case.
Good luck, G. G.

Glenn Horrocks April 28, 2004 18:26

Re: visualize the initial and/or boundary conditio
 
Hi,

There are other ways of doing it which do not require you to do a dummy simulation. For steady state runs you can, just after starting a run press "Backup Run"; or in CFX-Pre you can set it up to output the initial conditions with output control/backup results and set the iteration list to 0.

For transient runs, in CFX-Pre use Output Control/Transient Results, and set the time list to zero.

Regards, Glenn

test April 29, 2004 00:03

Re: visualize the initial and/or boundary conditio
 
To visualize the initial condition for a steady state run use the following expert parameter:

backup file at zero =t

This will create a backup file at 0th iteration! ie before the start of the solution so that you can view the initial guess.

IN cfx-5.7 you can visualize the boundary conditions in Pre itself.. I have not tested out the same for initial conditions!


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