flux.c File Reference

Computes numerical flux from conservative variables. More...

#include "flux.h"

Include dependency graph for flux.c:

Go to the source code of this file.

Macros
#define	gamma   1.4
#define	pmin   1e-15
#define	max(a, b)   (((a) > (b)) ? (a) : (b))

Functions
void	ns_flux_container (int nfvars, int ndims, double *u, double *nf, double *f)
	Computes flux for Navier-Stokes equations. More...
void	rans_flux_container (int nfvars, int ndims, int nturbvars, double *u, double *nf, double *f)
	Computes flux for RANS equations. More...
int	rans_source_jacobian (int nvars, int ntvars, double betast, double *uf, double *tmat, double *dsrc)
	Computes source term Jacobian matrix for RANS equations. More...

Detailed Description

Computes numerical flux from conservative variables.

======================================================================================================================

Non-physical value correction included.

Author

• Namhyoung Kim (knhks.nosp@m.e@in.nosp@m.ha.ed.nosp@m.u), Department of Aerospace Engineering, Inha University
• Jin Seok Park (jinse.nosp@m.ok.p.nosp@m.ark@i.nosp@m.nha..nosp@m.ac.kr), Department of Aerospace Engineering, Inha University

Date

July 2024

Version

1.0

Copyright

Copyright (c) 2024, Namhyoung Kim and Jin Seok Park, Inha University, All rights reserved.

License

This project is release under the terms of the MIT License (see LICENSE file).

---

Definition in file flux.c.

Macro Definition Documentation

gamma

#define gamma   1.4

Specific heat ratio

Definition at line 24 of file flux.c.

max

#define max	(		a,
			b
	)		(((a) > (b)) ? (a) : (b))

Definition at line 29 of file flux.c.

pmin

#define pmin   1e-15

Minimum pressure value

Definition at line 26 of file flux.c.

Function Documentation

ns_flux_container()

void ns_flux_container	(	int	nfvars,
		int	ndims,
		double *	u,
		double *	nf,
		double *	f
	)

Computes flux for Navier-Stokes equations.

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 37 of file flux.c.

Here is the caller graph for this function:

rans_flux_container()

void rans_flux_container	(	int	nfvars,
		int	ndims,
		int	nturbvars,
		double *	u,
		double *	nf,
		double *	f
	)

Computes flux for RANS equations.

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 85 of file flux.c.

Here is the caller graph for this function:

rans_source_jacobian()

int rans_source_jacobian	(	int	nvars,
		int	ntvars,
		double	betast,
		double *	uf,
		double *	tmat,
		double *	dsrc
	)

Computes source term Jacobian matrix for RANS equations.

Parameters

nvars	Number of conservative variables
ntvars

Definition at line 101 of file flux.c.

Here is the caller graph for this function: