version 3.8
Dumux::NavierStokesMomentumBoundaryFluxHelper Struct Reference

Struct containing flux helper functions to be used in the momentum problem's Neumann function.

#include <dumux/freeflow/navierstokes/momentum/fluxhelper.hh>

Static Public Member Functions

template<class Problem , class FVElementGeometry , class ElementVolumeVariables , class ElementFluxVariablesCache , class Scalar >
static auto fixedPressureMomentumFlux (const Problem &problem, const FVElementGeometry &fvGeometry, const typename FVElementGeometry::SubControlVolumeFace &scvf, const ElementVolumeVariables &elemVolVars, const ElementFluxVariablesCache &elemFluxVarsCache, const Scalar pressure, const bool zeroNormalVelocityGradient=true)
 Returns the momentum flux a fixed-pressure boundary. More...
 
template<class Problem , class FVElementGeometry , class ElementVolumeVariables , class ElementFluxVariablesCache , class TangentialVelocityGradient = double>
static auto slipVelocityMomentumFlux (const Problem &problem, const FVElementGeometry &fvGeometry, const typename FVElementGeometry::SubControlVolumeFace &scvf, const ElementVolumeVariables &elemVolVars, const ElementFluxVariablesCache &elemFluxVarsCache, const TangentialVelocityGradient &tangentialVelocityGradient=TangentialVelocityGradient(0.0))
 Returns the momentum flux for a boundary with a slip condition. More...
 

Member Function Documentation

◆ fixedPressureMomentumFlux()

template<class Problem , class FVElementGeometry , class ElementVolumeVariables , class ElementFluxVariablesCache , class Scalar >
static auto Dumux::NavierStokesMomentumBoundaryFluxHelper::fixedPressureMomentumFlux ( const Problem &  problem,
const FVElementGeometry &  fvGeometry,
const typename FVElementGeometry::SubControlVolumeFace &  scvf,
const ElementVolumeVariables &  elemVolVars,
const ElementFluxVariablesCache &  elemFluxVarsCache,
const Scalar  pressure,
const bool  zeroNormalVelocityGradient = true 
)
inlinestatic
Parameters
problemThe problem
fvGeometryThe finite-volume geometry
scvfThe sub control volume face
elemVolVarsThe volume variables for the element
elemFluxVarsCacheThe flux variables cache for the element
pressureThe pressure given at the boundary
zeroNormalVelocityGradientIf set to false, this yields a "natural" outflow condition where the flow tends to diverge at the boundary. If set to true (default), this yields a "do-nothing" outflow condition where \(\mathbf{v} \cdot \mathbf{n} = 0\) is satisfied and the general flow field is preserved in many cases. See, e.g., https://www.math.uni-magdeburg.de/~richter/WS17/numns/fem.pdf for details.

◆ slipVelocityMomentumFlux()

template<class Problem , class FVElementGeometry , class ElementVolumeVariables , class ElementFluxVariablesCache , class TangentialVelocityGradient = double>
static auto Dumux::NavierStokesMomentumBoundaryFluxHelper::slipVelocityMomentumFlux ( const Problem &  problem,
const FVElementGeometry &  fvGeometry,
const typename FVElementGeometry::SubControlVolumeFace &  scvf,
const ElementVolumeVariables &  elemVolVars,
const ElementFluxVariablesCache &  elemFluxVarsCache,
const TangentialVelocityGradient &  tangentialVelocityGradient = TangentialVelocityGradient(0.0) 
)
inlinestatic
Parameters
problemThe problem
fvGeometryThe finite-volume geometry
scvfThe sub control volume face
elemVolVarsThe volume variables for the element
elemFluxVarsCacheThe flux variables cache for the element
tangentialVelocityGradientA user-specified velocity gradient in tangential direction of the boundary. Only used for certain situations where this gradient cannot be determined automatically (e.g., at lateral Neumann boundaries).

The documentation for this struct was generated from the following file: