Different Flow in One Case
 

Hello everyone, got a problem...

Here is the case: I have a tube in tube case which includes 2 kinds of flow. The inner flow is Turbulent but the outer flow is Laminar. The two flow are sperated by a steel tube which is solid. The temperature of the two flow are different,so there is heat flux go through the steel tube leading to thermal exchang of the two flows.

Questions: (1)Can I specify different model for the 2 kinds of flow in one case? (2)Can I specify different solver setting for the 2 kinds of flow in one case?

Thanks very much.