Learning Forum

[haibo]

I am going to simulate the fluid-solid-thermal interaction by Fluent, Transient Structure and the System Coupling. Can I make the time step size a function over time in the System Coupling, because one case about the FTSI takes too much time using fixed time step size such as 0.004s.

[Rahul]

Hello

Yes, you can make the time step size a function over time in the System Coupling using expressions like "0.2 if Step < 5 else 0.25". 
Please refer to the System Coupling user guide for more information. Expressions in System Coupling (ansys.com)

Hope this helps!