Refer to the origin (Gravitation)

The Refer to the origin option allows you to change the reference point for the spatial distribution of pressure.

Prerequisites

By default, the reference point of pressure is located at the origin of the Global Coordinate System.

If you want to change the reference point, check the Refer to the origin box.
Then select the desired coordinate system:
- in the Initial and Ambient conditions dialog box of the Wizard or General Settings, click Coordinate system;
- for Thermodynamic Parameters in the Fluid Subdomain, specify Coordinate system under Selection;
- for Thermodynamic Parameters in the Initial Condition, specify Coordinate system under Selection;
- for Thermodynamic Parameters in the Boundary Condition, specify Coordinate system under Selection.