flux.h File Reference

Header file for numerical flux funtions. More...

#include "ucfd_types.h"
#include "config.h"

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Macros
#define	BETAST   0.09
#define	GAMMA   1.4
#define	PMIN   1e-13

Functions
void	ns_flux_container (UCFD_FLOAT *u, UCFD_FLOAT *nf, UCFD_FLOAT *f)
	Computes flux for Navier-Stokes equations. More...
void	rans_flux_container (UCFD_FLOAT *u, UCFD_FLOAT *nf, UCFD_FLOAT *f)
	Computes flux for RANS equations. More...
ucfd_status_t	rans_source_jacobian (UCFD_FLOAT *uf, UCFD_FLOAT tmat[NTURBVARS][NTURBVARS], UCFD_FLOAT *dsrc)
	Computes source term Jacobian matrix for RANS equations. More...
void	print_configure ()

Detailed Description

Header file for numerical flux funtions.

Declaration of convective flux for Navier-Stokes and RANS equations.

Definition in file flux.h.

Macro Definition Documentation

BETAST

#define BETAST   0.09

Definition at line 25 of file flux.h.

GAMMA

#define GAMMA   1.4

Definition at line 28 of file flux.h.

PMIN

#define PMIN   1e-13

Definition at line 31 of file flux.h.

Function Documentation

ns_flux_container()

void ns_flux_container	(	UCFD_FLOAT *	u,
		UCFD_FLOAT *	nf,
		UCFD_FLOAT *	f
	)

Computes flux for Navier-Stokes equations.

Parameters

u	Conservative vector
nf	Surface vector
f	Flux vector

Computes Euler/Navier-Stokes flux vector.
Jacobian matrix is replaced by first-order flux function, typically Rusanov flux is implemented.
Therefore, only convective flux is used.

Variable description :
rho : Density
et : Total Energy
temp : \(\rho^2 \times (u^2 + v^2)\)
contrav : Contravariant velocity

Definition at line 29 of file flux.c.

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print_configure()

void print_configure

(

)

rans_flux_container()

void rans_flux_container	(	UCFD_FLOAT *	u,
		UCFD_FLOAT *	nf,
		UCFD_FLOAT *	f
	)

Computes flux for RANS equations.

Parameters

u	Conservative vector
nf	Surface vector
f	Flux vector

Computes convective flux for RANS one- or two-equations.
Similar to the Navier-Stokes equations, RANS equations can be reformulated into the finite-volume framework.
It contains conservative variables, convective/viscous flux, and source term. Convective flux in RANS equations is computed simply by multiplying conservative variables and contravariant velocity.

Definition at line 77 of file flux.c.

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rans_source_jacobian()

ucfd_status_t rans_source_jacobian	(	UCFD_FLOAT *	uf,
		UCFD_FLOAT	tmat[NTURBVARS][NTURBVARS],
		UCFD_FLOAT *	dsrc
	)

Computes source term Jacobian matrix for RANS equations.

Parameters

betast	beta* value for kw-SST RANS model
uf	Conservative vector
tmat	Turbulence Jacobian matrix
dsrc	Source term derivatives vector

Definition at line 93 of file flux.c.

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