cs_rad_transfer_bcs.h File Reference

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Functions
void	cs_rad_transfer_bcs (int nvar, int bc_type[], int icodcl[], cs_real_t dt[], cs_real_t rcodcl[])
	Compute wall temperature for radiative transfer, and update BCs. More...
void	cs_rad_transfer_bc_coeffs (int bc_type[], cs_real_t vect_s[3], cs_real_t coefap[], cs_real_t coefbp[], cs_real_t cofafp[], cs_real_t cofbfp[], cs_real_t ckmel[], cs_real_t w_gg[], int gg_id)
	Boundary conditions for DO and P-1 models. More...

Function Documentation

cs_rad_transfer_bc_coeffs()

void cs_rad_transfer_bc_coeffs	(	int	bc_type[],
		cs_real_t	vect_s[3],
		cs_real_t	coefap[],
		cs_real_t	coefbp[],
		cs_real_t	cofafp[],
		cs_real_t	cofbfp[],
		cs_real_t	ckmel[],
		cs_real_t	w_gg[],
		int	gg_id
	)

Boundary conditions for DO and P-1 models.

1. Boundary conditions for the radiative intensity (DO model)

The array coefap stores the intensity for each boundary faces, depending of the natur of the boundary (Dirichlet condition). The intensity of radiation is defined as the rate of emitted energy from unit surface area through unit solid angle.

1/ Gray wall: isotropic radiation field. 4 eps.sig.twall (1-eps).qincid coefap = -----------— + -----------— pi pi wall intensity wall emission reflecting flux. (eps=1: black wall; eps=0: reflecting wall) 2/ Free boundary: condition to mimic infinite domain

2. Boundary conditions for the P-1 model

Parameters

[in]	bc_type	boundary face types
[in]	vect_s	direction vector or NULL
[out]	coefap	boundary conditions for intensity or P-1 model
[out]	coefbp	boundary conditions for intensity or P-1 model
[out]	cofafp	boundary conditions for intensity or P-1 model
[out]	cofbfp	boundary conditions for intensity or P-1 model
[in]	ckmel	coeff d'absorption du melange gaz-particules de charbon
[in]	w_gg	Weights of the i-th gray gas at boundaries
[in]	gg_id	number of the i-th grey gas

1. Boundary conditions for the radiative intensity (DO model)

The array coefap stores the intensity for each boundary faces, depending of the natur of the boundary (Dirichlet condition). The intensity of radiation is defined as the rate of emitted energy from unit surface area through unit solid angle.

1/ Gray wall: isotropic radiation field. 4 eps.sig.twall (1-eps).qincid coefap = -----------— + -----------— pi pi wall intensity wall emission reflecting flux. (eps=1: black wall; eps=0: reflecting wall) 2/ Free boundary: condition to mimic infinite domain

2. Boundary conditions for the P-1 model

Parameters

[in]	bc_type	boundary face types
[in]	vect_s	direction vector or NULL
[out]	coefap	boundary conditions for intensity or P-1 model
[out]	coefbp	boundary conditions for intensity or P-1 model
[out]	cofafp	boundary conditions for intensity or P-1 model
[out]	cofbfp	boundary conditions for intensity or P-1 model
[in]	ckmel	coeff d'absorption du melange gaz-particules de charbon
[in]	w_gg	Weights of the i-th gray gas at boundaries
[in]	gg_id	number of the i-th grey gas

cs_rad_transfer_bcs()

void cs_rad_transfer_bcs	(	int	nvar,
		int	bc_type[],
		int	icodcl[],
		cs_real_t	dt[],
		cs_real_t	rcodcl[]
	)

Compute wall temperature for radiative transfer, and update BCs.

1) Compute wall temperature for radiative transfer

2) Update BCs for the energy computation

Parameters

[in]	nvar	total number of variable BC's
[in,out]	icodcl	face boundary condition code: 1 Dirichlet 2 Radiative outlet 3 Neumann 4 sliding and 5 smooth wall and 6 rough wall and 9 free inlet/outlet (input mass flux blocked to 0) 13 Dirichlet for the advection operator and Neumann for the diffusion operator
[in]	bc_type	face boundary condition type
[in]	dt	time step (per cell)
[in,out]	rcodcl	boundary condition values: rcodcl(1) value of the dirichlet rcodcl(2) value of the exterior exchange coefficient (infinite if no exchange) rcodcl(3) value flux density (negative if gain) in w/m2 or roughness in m if icodcl=6 for the velocity for the pressure for a scalar