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Data Fields
cs_rad_transfer_params_t Struct Reference

Structure containing the radiation module parameters. More...

#include <cs_rad_transfer.h>

Collaboration diagram for cs_rad_transfer_params_t:
Collaboration graph

Data Fields

int iirayo
 
int nrphas
 
int iimpar
 
int iimlum
 
int imodak
 
int imoadf
 
int iwrp1t
 
int imfsck
 
double xnp1mx
 
int idiver
 
int i_quadrature
 
int ndirec
 
int ndirs
 
cs_real_3_tsxyz
 
cs_real_tangsol
 
int restart
 
int nfreqr
 
int nwsgg
 
cs_real_twq
 
int nzfrad
 
int itpimp
 
int ipgrno
 
int iprefl
 
int ifgrno
 
int ifrefl
 
int itpt1d
 

Detailed Description

Structure containing the radiation module parameters.

Field Documentation

◆ angsol

angsol

Weight of the solid angle.

◆ i_quadrature

i_quadrature

Index of the quadrature and number of directions for a single octant.
Sn quadrature (n(n+2) directions)

  • 1: S4 (24 directions)
  • 2: S6 (48 directions)
  • 3: S8 (80 directions)
    Tn quadrature (8n^2 directions)
  • 4: T2 (32 directions)
  • 5: T4 (128 directions)
  • 6: Tn (8*ndirec^2 directions)

◆ idiver

idiver

Indicates the method used to calculate the radiative source term:

  • 0: semi-analytic calculation (compulsory with transparent media)
  • 1: conservative calculation
  • 2: semi-analytic calculation corrected in order to be globally conservative

◆ ifgrno

ifgrno

Grey or black wall face to which a conduction flux is imposed.

◆ ifrefl

ifrefl

Reflecting wall face to which a conduction flux is imposed, which is equivalent to impose this flux directly to the fluid.

◆ iimlum

iimlum

Verbosity level in the listing concerning the calculation of the radiative transfer equation:

  • 0: no display
  • 1: standard
  • 2: complete

◆ iimpar

iimpar

Verbosity level in the listing concerning the calculation of the wall temperatures:

  • 0: no display
  • 1: standard
  • 2: complete

◆ iirayo

iirayo

Activate ( $>0$) or deactivate (=0) the radiation module. The different values correspond to the following modelling methods:

  • 1: discrete ordinates method (DOM standard option for radiation in semi-transparent media)
  • 2: "P-1" method
    Warning: the P-1 method allows faster computations, but it may only be applied to media with uniform large optical thickness, such as some cases of pulverised coal combustion.

◆ imfsck

imfsck

FSCK model:

  • 0 no FSCK model
  • 1 FSCK model activated

◆ imoadf

imoadf

ADF model:

  • 0 no ADF model
  • 1 ADF model with 8 intervals of wave length
  • 2 ADF model with 50 intervals of wave length

◆ imodak

imodak

When gas or coal combustion is activated, imodak indicates whether the absorption coefficient shall be calculated "automatically" (=1) or read from the data file (=0).

◆ ipgrno

ipgrno

For a grey or black wall face, calculation of the temperature by means of a flux balance.

◆ iprefl

iprefl

For a reflecting wall face, calculation of the temperature by means of a flux balance. This is fixed at 2000 in radiat and cannot be modified.

◆ itpimp

itpimp

Wall face with imposed temperature.

◆ itpt1d

itpt1d

Calculation of the temperature with the 1D wall thermal module, which solves a heat equation.

◆ iwrp1t

iwrp1t

P1 model transparency warnings counter.

◆ ndirec

ndirec

Number of directions for the angular discretisation of the radiation propagation with the DOM model (iirayo = 1)
No other possible value, because of the way the directions are calculated.
The calculation with 32 directions may break the symmetry of physically axi-symmetric cases (but the cost in CPU time is much lower than with 128 directions).
Useful if and only if the radiation module is activated with the DOM method.

◆ ndirs

ndirs

For the Tn quadrature, ndirec squared

◆ nfreqr

nfreqr

Period of the radiation module. The radiation module is called every nfreqr time steps (more precisely, every time ntcabs is a multiple of nfreqr). Also, in order to have proper initialization of the variables, whatever the value of nfreqr, the radiation module is called at the first time step of a calculation (restart or not).

◆ nrphas

nrphas

Phase which radiates (bulk by default, but may be coal class or fuel droplets phase).

◆ nwsgg

nwsgg

Spectral radiation models (ADF and FSCK).
Number of ETRs to solve.

◆ nzfrad

int nzfrad

◆ restart

restart

Indicates whether the radiation variables should be initialized or read from a restart file.

◆ sxyz

sxyz

Directions of angular values of the quadrature sx, sy, sz.

◆ wq

wq

Weights of the Gaussian quadrature

◆ xnp1mx

xnp1mx

For the P-1 model, percentage of cells for which we allow the optical thickness to exceed unity, although this should be avoided. (more precisely, where $ KL $ is lower than 1, where $ K $ is the absorption coefficient of the medium and $ L $ is a characteristic length of the domain).


The documentation for this struct was generated from the following files: