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Description

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

\[p_{rgh} = p - \rho g (h - h_{ref})\] \[p = p_0 - 0.5 \rho |\vec{u}|^2\]

where:

Property Description
\(p_{rgh}\) Pseudo hydrostatic pressure [Pa]
\(p\) Static pressure [Pa]
\(p_0\) Total 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            prghTotalPressure;
    p0              <scalarField>;

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

    // Inherited entries
    ...
}

where:

Property Description Type Required Default
type Type name: prghTotalPressure word yes -
p0 Total pressure field 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

The inherited entries are elaborated in:

Further information

Tutorial:

Source code:

API:

History:

  • Introduced in version 2.4.0