Hey! What are the default initial conditions in a computational domain in CFX4 and how do you change them (twin-fluid case without heat transfer)?

Regards Allan

Hi,
You can find out which are the default initial conditions when you run the setup (pre-process -> run setup)for your command file. Once you're there go at "Utilities" and switch at least to "Intermediate Level". Go to MODEL DATA -> SET INITIAL GUESS and you'll find the default values for the variables used in your problem.
Regards, cfd guy

Hi, If the ambient variables are set, does that influence the initial values in the domain or just outside?

Regards Allan

If you set a constant guess, the ambient variables has not anything to do with the initial guess. I don't use to change these ambient variables, except pressure which I change it as necessary.
Regards, cfd guy

Hi, When I set the ambient variables, and not any initial guess, what happens then?

Regards Allan

If you don't supply values such ambient variables and/or initial guesses(if you don't set any restart file), CFX-4 will use the default ones. To take a look at the default values you must go to setup and verify there what you want to know.
cfd guy