zero fluid dilatation

Module: fluid

Category: bc

Type string: "zero fluid dilatation"

Parameters

This feature has no parameters.

Description

To fix the fluid dilatation \(e^{f}\) in a fluid or fluid-FSI or fluid-solutes analysis, use the zero fluid dilatation boundary condition.

<bc node_set="set01" type="zero fluid dilatation"/>

Zero fluid dilatation is the same as setting the effective fluid pressure \(\tilde{p}\) to zero in fluid analyses. If you want to set the actual fluid pressure p to some value (such as zero) in a fluid analysis, use the fluid pressure boundary condition fluid-Pressure.