CFX has a CEL variable called subdomain. According to the documentation this can be used to give different initial conditions for different subdomains. Is it possible to use something similar to give a different timestep in different domains of a steady state problem.

I believe theres some power syntax for doing something like this on the CFX community site (Tech Notes).

Jeff

Expressions can be used for timesteps, but are not evaluated locally. If you want different timesteps in different domains, there is a beta feature to do this. You can include a solver control object within a domain to create a domain specific timestep. This can be done by copying and pasting the solver control CCL into the domain object or simply copy the solver control object (right click, copy), select the desired domain, then paste. You can then right click on the solver control object and edit the CCL in the command editor. The domain specific control will override the global control.

This is not a supported feature and you may find that Pre deletes your custom CCL when you do other operations. You should probably do this step last before writing your def file.

Note that this can only be done for steady state simulations (wouldn't make sense for a transient anyhow).

Regards, Robin

Thanks Robin, I will be trying that. Sounds sensible. Regards,