Setup — Operating conditions

Setup → Operating conditions

Set reference pressure and, for thermal cases, the buoyancy reference temperature and gravity vector.

Open Settings → Operating Conditions.
Enter the reference pressure. With heat transfer enabled, select Buoyancy if required.
For buoyancy, enter the reference temperature and gravity components, then click Apply.

Input or value	Meaning	Units
Reference pressure	Absolute reference pressure.	Pa
Reference temperature	Reference value for buoyancy.	K
g(x), g(y), g(z)	Signed gravity components along the global axes.	m/s²

This dialog currently uses the SI units shown above. Buoyancy controls are enabled only with heat transfer; temperature and gravity inputs are enabled when Buoyancy is selected.