prob/cpaw1d.c File Reference

Problem generator for 1-D circularly polarized Alfven wave (CPAW) test. More...

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Functions
void	problem (DomainS *pDomain)
	Problem initial conditions, edited for each problem.
void	problem_write_restart (MeshS *pM, FILE *fp)
	Problem specific subroutine for use with writing restart files, Edited for each problem.
void	problem_read_restart (MeshS *pM, FILE *fp)
	Problem specific subroutine for use with reading restart files, Edited for each problem.
ConsFun_t	get_usr_expr (const char *expr)
	Sets pointer to expression for special output data.
VOutFun_t	get_usr_out_fun (const char *name)
	Returns a user defined output function pointer.
void	get_eta_user (GridS *pG, int i, int j, int k, Real *eta_O, Real *eta_H, Real *eta_A)
	Get user defined resistivity.
void	Userwork_in_loop (MeshS *pM)
	Problem work executed during each step in the main Athena loop, see main.c.
void	Userwork_after_loop (MeshS *pM)
	Problem work executed after the main Athena loop, see main.c Edited for each problem.
Variables
static ConsS *	RootSoln = NULL

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Detailed Description

Problem generator for 1-D circularly polarized Alfven wave (CPAW) test.

PURPOSE: Problem generator for 1-D circularly polarized Alfven wave (CPAW) test. Only works in 1D (wavevector in x). Tests in 2D and 3D are initialized with different functions.

Can be used for either standing (problem/v_par=1.0) or travelling (problem/v_par=0.0) waves.

USERWORK_AFTER_LOOP function computes L1 error norm in solution by comparing to initial conditions. Problem must be evolved for an integer number of wave periods for this to work.

REFERENCE: G. Toth, "The div(B)=0 constraint in shock capturing MHD codes", JCP, 161, 605 (2000)

Definition in file cpaw1d.c.

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Function Documentation

void get_eta_user	(	GridS *	pG,
		int	i,
		int	j,
		int	k,
		Real *	eta_O,
		Real *	eta_H,
		Real *	eta_A
	)

Get user defined resistivity.

Definition at line 200 of file cpaw1d.c.

Referenced by eta_general_user(), and eta_single_user().

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ConsFun_t get_usr_expr

(

const char *

expr

)

Sets pointer to expression for special output data.

Definition at line 187 of file cpaw1d.c.

VOutFun_t get_usr_out_fun

(

const char *

name

)

Returns a user defined output function pointer.

Definition at line 192 of file cpaw1d.c.

void problem

(

DomainS *

pDomain

)

Problem initial conditions, edited for each problem.

Definition at line 40 of file cpaw1d.c.

References ath_error(), ConsS::B1c, GridS::B1i, ConsS::B2c, GridS::B2i, ConsS::B3c, GridS::B3i, b_par, b_perp, cc_pos(), ConsS::d, d_ind, ConsS::E, fac, Gamma_1, DomainS::Grid, GridS::ie, GridS::is, GridS::js, k_par, GridS::ks, lambda, DomainS::Level, ConsS::M1, ConsS::M2, ConsS::M3, GridS::Nx, par_getd(), par_geti_def(), Q_Hall, DomainS::RootMaxX, DomainS::RootMinX, Soln, and GridS::U.

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void problem_read_restart	(	MeshS *	pM,
		FILE *	fp
	)

Problem specific subroutine for use with reading restart files, Edited for each problem.

Definition at line 182 of file cpaw1d.c.

void problem_write_restart	(	MeshS *	pM,
		FILE *	fp
	)

Problem specific subroutine for use with writing restart files, Edited for each problem.

Definition at line 177 of file cpaw1d.c.

void Userwork_after_loop

(

MeshS *

pM

)

Problem work executed after the main Athena loop, see main.c Edited for each problem.

Definition at line 222 of file cpaw1d.c.

References ath_error(), ConsS::B1c, ConsS::B2c, ConsS::B3c, ConsS::d, MeshS::Domain, ConsS::E, error, DomainS::Grid, GridS::ie, GridS::is, GridS::js, GridS::ks, ConsS::M1, ConsS::M2, ConsS::M3, and GridS::U.

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void Userwork_in_loop

(

MeshS *

pM

)

Problem work executed during each step in the main Athena loop, see main.c.

Edited for each problem.

Definition at line 212 of file cpaw1d.c.

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Variable Documentation

ConsS* RootSoln = NULL [static]

Definition at line 35 of file cpaw1d.c.