prghTotalHydrostaticPressure

Description

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

$$p_{rgh} = {ph}_{rgh} - 0.5 \rho |\vec{u}|^2$$

where:

Property	Description
$p_{rgh}$	Pressure: $\rho g (h - h_{ref})$ [Pa]
$p$	Hydrostatic pressure: $\rho g (h - h_{ref})$ [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            prghTotalHydrostaticPressure;

    // Optional entries
    rho             <word>;
    phi             <word>;
    U               <word>;
    ph_rgh          <word>;

    // Inherited entries
    ...
}

where:

Property	Description	Type	Required	Default
type	Type name: prghTotalHydrostaticPressure	word	yes	-
rho	Name of density field	word	no	rho
phi	Name of flux field	word	no	phi
U	Name of velocity field	word	no	U
ph_rgh	Name of ph_rgh field	word	no	ph_rgh

The inherited entries are elaborated in:

• Foam::fixedValueFvPatchField

Further information

Tutorial:

• smallPoolFire2D

Source code:

• prghTotalHydrostaticPressure

API:

• Foam::prghTotalHydrostaticPressureFvPatchScalarField

History: Introduced in version v1606+