initial fluid pressure¶
Module: biphasic
Category: ic
Type string: "initial fluid pressure"
Parameters¶
| Name | Description | Default | Units |
|---|---|---|---|
value |
value | 0 | [] |
Description¶
The initial fluid pressure initial condition can be used in biphasic and multiphasic analyses. In all cases it sets the initial value of the effective fluid pressure \(\tilde{p}\). If the analysis includes solutes (multiphasic), it is the user's responsibility to evaluate \(\tilde{p}\), knowing the values of the universal gas constant \(R\) and absolute temperature \(T\) specified in the Globals section, and the values of initial effective solute concentrations \(\tilde{c}\) in the given multiphasic or fluid-solutes domain.
In biphasic and multiphasic analyses the value of \(\tilde{p}\) is prescribed directly as a nodal degree of freedom.