rsolvers/roe.c File Reference

Computes 1D fluxes using Roe's linearization. More...

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Functions
void	flux_hlle (const Cons1DS Ul, const Cons1DS Ur, const Prim1DS Wl, const Prim1DS Wr, const Real Bxi, Cons1DS *pFlux)
	Function prototype for HLLE fluxes.
void	fluxes (const Cons1DS Ul, const Cons1DS Ur, const Prim1DS Wl, const Prim1DS Wr, const Real Bxi, Cons1DS *pFlux)
	Calculates fluxes of CONSERVED variables.
Variables
Real	etah = 0.0

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Detailed Description

Computes 1D fluxes using Roe's linearization.

PURPOSE: Computes 1D fluxes using Roe's linearization. When Roe's method fails because of negative density or pressure in the intermediate states, the fluxes are computed with the HLLE solver instead.

REFERENCES:

• P. Roe, "Approximate Riemann solvers, parameter vectors, and difference schemes", JCP, 43, 357 (1981).

CONTAINS PUBLIC FUNCTIONS:

• fluxes() - all Riemann solvers in Athena must have this function name and use the same argument list as defined in rsolvers/prototypes.h
• HLLE_FUNCTION - since the HLLE solver is requird in conjunction with the Roe solver, the HLLE solver is included from the file hlle.c at the end of this file, and the HLLE flux function is renamed to be different than "fluxes" (the name used in Athena for R-solvers).

Definition in file roe.c.

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Function Documentation

void flux_hlle	(	const Cons1DS	Ul,
		const Cons1DS	Ur,
		const Prim1DS	Wl,
		const Prim1DS	Wr,
		const Real	Bxi,
		Cons1DS *	pFlux
	)

Function prototype for HLLE fluxes.

Referenced by fluxes().

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void fluxes	(	const Cons1DS	Ul,
		const Cons1DS	Ur,
		const Prim1DS	Wl,
		const Prim1DS	Wr,
		const Real	Bxi,
		Cons1DS *	pFlux
	)

Calculates fluxes of CONSERVED variables.

Computes 1D fluxes Input Arguments:

• Bxi = B in direction of slice at cell interface
• Ul,Ur = L/R-states of CONSERVED variables at cell interface Output Arguments:
• pFlux = pointer to fluxes of CONSERVED variables at cell interface.

Computes 1D fluxes.

Compute 1D fluxes Input Arguments:

• Bxi = B in direction of slice at cell interface
• Ul,Ur = L/R-states of CONSERVED variables at cell interface.

Computes 1D fluxes Input Arguments:

• Ul,Ur = L/R-states of CONSERVED variables at cell interface
• Wl,Wr = L/R-states of PRIMITIVE variables at cell interface Output Arguments:
• pFlux = pointer to fluxes of CONSERVED variables at cell interface.

Computes 1D fluxes Input Arguments:

• Ul,Ur = L/R-states of CONSERVED variables at cell interface Output Arguments:
• pFlux = pointer to fluxes of CONSERVED variables at cell interface.

Computes 1D fluxes Input Arguments:

• Bxi = B in direction of 1D slice at cell interface
• Ul,Ur = L/R-states of CONSERVED variables at cell interface Output Arguments:
• pFlux = pointer to fluxes of CONSERVED variables at cell interface.

Computes 1D fluxes using exact special relativistic Riemann solver.

Computes fluxes of CONSERVES variables.

Input Arguments:

• Bxi = B in direction of slice at cell interface
• Ul,Ur = L/R-states of CONSERVED variables at cell interface Output Arguments:
• pFlux = pointer to fluxes of CONSERVED variables at cell interface

Input Arguments:

• Bxi = B in direction of slice at cell interface
• Ul,Ur = L/R-states of CONSERVED variables at cell interface Output Arguments:
• pF = pointer to fluxes of CONSERVED variables at cell interface

Input Arguments:

• Ul,Ur = L/R-states of CONSERVED variables at cell interface
• Bx = B in direction of slice at cell interface Output Arguments:
• pF = pointer to fluxes of CONSERVED variables at cell interface

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Output Arguments:

• Flux = fluxes of CONSERVED variables at cell interface

Input Arguments:

• Ul,Ur = L/R-states of CONSERVED variables at cell interface
• Bx = B in direction of slice at cell interface Output Arguments:
• pFlux = pointer to fluxes of CONSERVED variables at cell interface

Definition at line 59 of file roe.c.

References a, Cons1DS::By, Prim1DS::By, Cons1DS::Bz, Prim1DS::Bz, Cons1DS::d, Prim1DS::d, Cons1DS::E, esys_roe_adb_hyd(), esys_roe_adb_mhd(), esys_roe_iso_hyd(), esys_roe_iso_mhd(), etah, flux_hlle(), Gamma_1, Iso_csound2, Cons1DS::Mx, Cons1DS::My, Cons1DS::Mz, n, Prim1DS::P, Cons1DS::Pflux, Prim1DS::r, Cons1DS::s, Prim1DS::Vx, Prim1DS::Vy, and Prim1DS::Vz.

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Variable Documentation

Real etah = 0.0

Definition at line 33 of file roe.c.

Referenced by fluxes(), integrate_2d_ctu(), integrate_2d_vl(), integrate_3d_ctu(), and integrate_3d_vl().