OpenFOAM Documentation - supersonicFreestream

boundary conditions

Description🔗

The supersonicFreestream is a boundary condition that provides a supersonic free-stream condition.

supersonic inflow is assumed to occur according to the Prandtl-Meyer expansion process.
subsonic outflow is applied via a zero-gradient condition from inside the domain.

Usage🔗

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

Boundary file🔗

<patchName>
{
    type            patch;
    ...
}

Field file🔗

<patchName>
{
    // Mandatory entries
    type            supersonicFreestream;
    UInf            <vector>;
    pInf            <scalar>;
    TInf            <scalar>;
    gamma           <scalar>;

    // Optional entries
    T               <word>;
    p               <word>;
    psi             <word>;

    // Inherited entries;
    ...
}

where:

Property	Description	Type	Required	Default
`type`	Type name: `supersonicFreestream`	word	yes	-
`UInf`	Freestream velocity	vector	yes	-
`pInf`	Freestream pressure	vector	yes	-
`TInf`	Freestream temperature	vector	yes	-
`gamma`	Heat capacity ratio	scalar	yes	-
`T`	Name of temperature field	word	no	T
`p`	Name of pressure field	word	no	p
`psi`	Name of compressibility field	word	no	thermo:psi