To apply a hydrostatic pressure load to a surface or surface region

To apply a pressure load which varies linearly across a surface or a surface region, use the following procedure.

Note: The selected surfaces must all have the same number of nodes.

A hydrostatic load is a linearly varying pressure load. This feature allows you to apply them parametrically based on fluid density and then converts this into variable pressure load for use by the program.

Select the surfaces or surface regions that will have the same hydrostatic load applied.
Note: You must select surfaces or surface regions separately. Loads cannot be added to those entity types simultaneously.

Select the tool for the entity type:

To hydrostatic loads to…	Do this…
Surfaces	On the Surface ribbon tab, select the Hydrostatic tool in the Loads group. The Add Surface Hydrostatic Pressure Load dialog opens.
Surface regions	On the Region ribbon tab, select the Hydrostatic tool in the Loads group. The Add Region Hydrostatic Pressure Load dialog opens.

Select the Load group or case to which the load will be added from the drop-down list.
(Optional) Type the Density to use for the fluid. The default value is for water.
Type the Zero pressure level. This is the global Y value of the top of fluid.
Select the face on which the hydrostatic pressure is applied.
Click OK.

The dialog closes and the load is applied to the selected surfaces or surface regions.

You can edit variable pressure load values for the current load group or load case by selecting the Variable pressure on surface tool or the Surface region pressure load tool in the Surfaces group on the Spreadsheet ribbon tab.