prghPressure

Description

The prghPressure is a boundary condition that provides static pressure condition for p_rgh, calculated as:

$$p_{rgh} = p - \rho g (h - h_{ref})$$

where:

Property	Description
$p_{rgh}$	Pseudo hydrostatic pressure [Pa]
$p$	Static pressure [Pa]
$h$	Height in the opposite direction to gravity
$h_{ref}$	Reference height in the opposite direction to gravity
$\rho$	Density
$g$	Acceleration due to gravity [m/s^2]

Usage

The condition requires entries in both the boundary and field files.

Boundary file

<patchName>
{
    type            patch;
    ...
}

Field file

<patchName>
{
    // Mandatory entries
    type            prghPressure;
    p               <scalarField>;

    // Optional entries
    rho             <word>;

    // Inherited entries
    ...
}

where:

Property	Description	Type	Required	Default
type	Type name: prghPressure	word	yes	-
p	Static pressure	scalarField	yes	-
rho	Name of density field	word	no	rho

The inherited entries are elaborated in:

• Foam::fixedValueFvPatchField

Further information

Tutorial:

• wallBoiling1D_2phase

Source code:

• prghPressure

API:

• Foam::prghPressureFvPatchScalarField

History: Introduced in version 2.3.0