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PatchIdealMHD Class Reference

An example PatchGodunov for polytropic, gamma-law gas dynamics. More...

#include <PatchIdealMHD.H>

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List of all members.

Public Methods

 PatchIdealMHD ()
virtual PatchGodunov * new_patchGodunov () const
 Factory method - this object is its own factory.

virtual Real getMaxWaveSpeed (const FArrayBox &a_U, const Box &a_box)
 Compute the maximum wave speed.

virtual int numConserved ()
 Number of conserved variables.

virtual Vector< string > stateNames ()
 Names of the conserved variables.

virtual int numFluxes ()
 Number of flux variables.


Protected Methods

virtual int numPrimitives ()
 Number of primitive variables.

virtual int numSlopes ()
 Number of primitive variables for which slopes are computed.

virtual void consToPrim (FArrayBox &a_W, const FArrayBox &a_U, const Box &a_box)
 Compute the primitive variables from the conserved variables within a_box.

virtual void primToCons (FArrayBox &a_U, const FArrayBox &a_W, const Box &a_box)
 Compute the conserved variables from the primitive variables within a_box.

virtual void normalPred (FArrayBox &a_WMinus, FArrayBox &a_WPlus, const FArrayBox &a_W, const FArrayBox &a_dW, const Real &a_scale, const int &a_dir, const Box &a_box)
 Extrapolate the primitive variables to the cell faces.

virtual void riemann (FArrayBox &a_F, const FArrayBox &a_WLeft, const FArrayBox &a_WRight, const int &a_dir, const Box &a_box)
 Compute a Riemann problem and generate fluxes at the faces.

virtual void updatePrim (FArrayBox &a_WMinus, FArrayBox &a_WPlus, const FArrayBox &a_F, const Real &a_scale, const int &a_dir, const Box &a_box)
 Update the primitive variables using fluxes (of the conserved variables).

virtual void updateCons (FArrayBox &a_U, const FArrayBox &a_F, const Real &a_scale, const int &a_dir, const Box &a_box)
 Update the conserved variable using fluxes and a scaling factor.

virtual void postUpdateCons (FArrayBox &a_U, const FArrayBox &a_Uold, const Real &a_dt, const Real &a_dx, const Box &a_box)
virtual Interval velocityInterval ()
 Interval within the primitive variables corresponding to the velocities.

virtual int pressureIndex ()
 Component index within the primitive variables of the pressure.

virtual int bulkModulusIndex ()
 Component index within the primitive variables of the bulk modulus.

Detailed Description

An example PatchGodunov for polytropic, gamma-law gas dynamics.

Constructor & Destructor Documentation

PatchIdealMHD::PatchIdealMHD (    ) 
 

Member Function Documentation

virtual int PatchIdealMHD::bulkModulusIndex (    )  [protected, virtual]
 

Component index within the primitive variables of the bulk modulus.

Return the component index withn the primitive variables for the bulk modulus. Used for slope flattening (slope computation) used as a normalization to measure shock strength.

Implements PatchGodunov.

virtual void PatchIdealMHD::consToPrim (  FArrayBox &    a_W,
const FArrayBox &    a_U,
const Box &    a_box
)  [protected, virtual]
 

Compute the primitive variables from the conserved variables within a_box.

Implements PatchGodunov.

virtual Real PatchIdealMHD::getMaxWaveSpeed (  const FArrayBox &    a_U,
const Box &    a_box
)  [virtual]
 

Compute the maximum wave speed.

Implements PatchGodunov.

virtual PatchGodunov* PatchIdealMHD::new_patchGodunov (    )  const [virtual]
 

Factory method - this object is its own factory.

Return a pointer to new PatchGodunov object with its initial and boundary condtions, slope parameters, and artificial viscosity information defined.

Implements PatchGodunov.

virtual void PatchIdealMHD::normalPred (  FArrayBox &    a_WMinus,
FArrayBox &    a_WPlus,
const FArrayBox &    a_W,
const FArrayBox &    a_dW,
const Real &    a_scale,
const int &    a_dir,
const Box &    a_box
)  [protected, virtual]
 

Extrapolate the primitive variables to the cell faces.

Extrapolate the primitive variables, a_W, in the minus and plus direction, a_dir, using the slopes a_dW within a_box. See document for details.

Implements PatchGodunov.

virtual int PatchIdealMHD::numConserved (    )  [virtual]
 

Number of conserved variables.

Return the number of conserved variables.

Implements PatchGodunov.

virtual int PatchIdealMHD::numFluxes (    )  [virtual]
 

Number of flux variables.

Return the number of flux variables. This can be greater than the number of conserved variables if addition fluxes/face-centered quantities are computed.

Implements PatchGodunov.

virtual int PatchIdealMHD::numPrimitives (    )  [protected, virtual]
 

Number of primitive variables.

Return the number of primitive variables. This may be greater than the number of conserved variables if derived/redundant quantities are also stored for convenience.

Implements PatchGodunov.

virtual int PatchIdealMHD::numSlopes (    )  [protected, virtual]
 

Number of primitive variables for which slopes are computed.

Return the number of primitive variables for which slopes are computed. Only slopes corresponding to primitive variables in the interval 0 to numSlopes() - 1 are computed and only primitive variables in that interval are updated using the slopes.

Implements PatchGodunov.

virtual void PatchIdealMHD::postUpdateCons (  FArrayBox &    a_U,
const FArrayBox &    a_Uold,
const Real &    a_dt,
const Real &    a_dx,
const Box &    a_box
)  [protected, virtual]
 

Reimplemented from PatchGodunov.

virtual int PatchIdealMHD::pressureIndex (    )  [protected, virtual]
 

Component index within the primitive variables of the pressure.

Return the component index withn the primitive variables for the pressure. Used for slope flattening (slope computation).

Implements PatchGodunov.

virtual void PatchIdealMHD::primToCons (  FArrayBox &    a_U,
const FArrayBox &    a_W,
const Box &    a_box
)  [protected, virtual]
 

Compute the conserved variables from the primitive variables within a_box.

virtual void PatchIdealMHD::riemann (  FArrayBox &    a_F,
const FArrayBox &    a_WLeft,
const FArrayBox &    a_WRight,
const int &    a_dir,
const Box &    a_box
)  [protected, virtual]
 

Compute a Riemann problem and generate fluxes at the faces.

Given input left and right states in a direction, a_dir, compute a Riemann problem and generate fluxes at the faces within a_box.

Implements PatchGodunov.

virtual Vector<string> PatchIdealMHD::stateNames (    )  [virtual]
 

Names of the conserved variables.

Return the names of the conserved variables.

Reimplemented from PatchGodunov.

virtual void PatchIdealMHD::updateCons (  FArrayBox &    a_U,
const FArrayBox &    a_F,
const Real &    a_scale,
const int &    a_dir,
const Box &    a_box
)  [protected, virtual]
 

Update the conserved variable using fluxes and a scaling factor.

Given the fluxes, a_F, in a direction, a_dir, and a scaling factor, a_scale, update the conserved variables, a_U, within a_box:

a_U = a_U - a_scale * (a_F(a_dir,HiSide) - a_F(a_dir,LoSide))

Implements PatchGodunov.

virtual void PatchIdealMHD::updatePrim (  FArrayBox &    a_WMinus,
FArrayBox &    a_WPlus,
const FArrayBox &    a_F,
const Real &    a_scale,
const int &    a_dir,
const Box &    a_box
)  [protected, virtual]
 

Update the primitive variables using fluxes (of the conserved variables).

Given the fluxes, a_F, in a direction, a_dir, and a scaling factor, a_scale, update the primitive variables, a_WMinus and a_WPlus, within a_box. Note: The fluxes are fluxes of conserved variables.

Implements PatchGodunov.

virtual Interval PatchIdealMHD::velocityInterval (    )  [protected, virtual]
 

Interval within the primitive variables corresponding to the velocities.

Return the interval of component indices within the primitive variable of the velocities. Used for slope flattening (slope computation) and computing the divergence of the velocity (artificial viscosity).

Implements PatchGodunov.

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