modele_turbulence_scal_base

Basic class for turbulence model for energy equation.

Parameters:

[dt_impr_nusselt] (type: float) Keyword to print local values of Nusselt number and temperature near a wall during a turbulent calculation. The values will be printed in the _Nusselt.face file each dt_impr_nusselt time period. The local Nusselt expression is as follows : Nu = ((lambda+lambda_t)/lambda)*d_wall/d_eq where d_wall is the distance from the first mesh to the wall and d_eq is given by the wall law. This option also gives the value of d_eq and h = (lambda+lambda_t)/d_eq and the fluid temperature of the first mesh near the wall. For the Neumann boundary conditions (flux_impose), the <<equivalent>> wall temperature given by the wall law is also printed (Tparoi equiv.) preceded for VEF calculation by the edge temperature <<T face de bord>>.
[dt_impr_nusselt_mean_only] (type: dt_impr_nusselt_mean_only) This keyword is used to print the mean values of Nusselt ( obtained with the wall laws) on each boundary, into a file named datafile_ProblemName_nusselt_mean_only.out. periode refers to the printing period, this value is expressed in seconds. If you don\'t use the optional keyword boundaries, all the boundaries will be considered. If you use it, you must specify nb_boundaries which is the number of boundaries on which you want to calculate the mean values, then you have to specify their names.
[turbulence_paroi] (type: turbulence_paroi_scalaire_base) Keyword to set the wall law.

modele_turbulence_scal_null

Synonyms: null

Inherits from: modele_turbulence_scal_base

Null scalar turbulence model (turbulent diffusivity = 0) which can be used with a turbulent problem.

Parameters:

[dt_impr_nusselt] (type: float) Keyword to print local values of Nusselt number and temperature near a wall during a turbulent calculation. The values will be printed in the _Nusselt.face file each dt_impr_nusselt time period. The local Nusselt expression is as follows : Nu = ((lambda+lambda_t)/lambda)*d_wall/d_eq where d_wall is the distance from the first mesh to the wall and d_eq is given by the wall law. This option also gives the value of d_eq and h = (lambda+lambda_t)/d_eq and the fluid temperature of the first mesh near the wall. For the Neumann boundary conditions (flux_impose), the <<equivalent>> wall temperature given by the wall law is also printed (Tparoi equiv.) preceded for VEF calculation by the edge temperature <<T face de bord>>.
[dt_impr_nusselt_mean_only] (type: dt_impr_nusselt_mean_only) This keyword is used to print the mean values of Nusselt ( obtained with the wall laws) on each boundary, into a file named datafile_ProblemName_nusselt_mean_only.out. periode refers to the printing period, this value is expressed in seconds. If you don\'t use the optional keyword boundaries, all the boundaries will be considered. If you use it, you must specify nb_boundaries which is the number of boundaries on which you want to calculate the mean values, then you have to specify their names.

prandtl

Inherits from: modele_turbulence_scal_base

The Prandtl model. For the scalar equations, only the model based on Reynolds analogy is available. If K_Epsilon was selected in the hydraulic equation, Prandtl must be selected for the convection-diffusion temperature equation coupled to the hydraulic equation and Schmidt for the concentration equations.

Parameters:

[prdt] (type: string) Keyword to modify the constant (Prdt) of Prandtl model : Alphat=Nut/Prdt Default value is 0.9
[prandt_turbulent_fonction_nu_t_alpha] (type: string) Optional keyword to specify turbulent diffusivity (by default, alpha_t=nu_t/Prt) with another formulae, for example: alpha_t=nu_t2/(0,7*alpha+0,85*nu_tt) with the string nu_t*nu_t/(0,7*alpha+0,85*nu_t) where alpha is the thermal diffusivity.
[dt_impr_nusselt] (type: float) Keyword to print local values of Nusselt number and temperature near a wall during a turbulent calculation. The values will be printed in the _Nusselt.face file each dt_impr_nusselt time period. The local Nusselt expression is as follows : Nu = ((lambda+lambda_t)/lambda)*d_wall/d_eq where d_wall is the distance from the first mesh to the wall and d_eq is given by the wall law. This option also gives the value of d_eq and h = (lambda+lambda_t)/d_eq and the fluid temperature of the first mesh near the wall. For the Neumann boundary conditions (flux_impose), the <<equivalent>> wall temperature given by the wall law is also printed (Tparoi equiv.) preceded for VEF calculation by the edge temperature <<T face de bord>>.
[dt_impr_nusselt_mean_only] (type: dt_impr_nusselt_mean_only) This keyword is used to print the mean values of Nusselt ( obtained with the wall laws) on each boundary, into a file named datafile_ProblemName_nusselt_mean_only.out. periode refers to the printing period, this value is expressed in seconds. If you don\'t use the optional keyword boundaries, all the boundaries will be considered. If you use it, you must specify nb_boundaries which is the number of boundaries on which you want to calculate the mean values, then you have to specify their names.
[turbulence_paroi] (type: turbulence_paroi_scalaire_base) Keyword to set the wall law.

schmidt

Inherits from: modele_turbulence_scal_base

The Schmidt model. For the scalar equations, only the model based on Reynolds analogy is available. If K_Epsilon was selected in the hydraulic equation, Schmidt must be selected for the convection-diffusion temperature equation coupled to the hydraulic equation and Schmidt for the concentration equations.

Parameters:

[scturb] (type: float) Keyword to modify the constant (Sct) of Schmlidt model : Dt=Nut/Sct Default value is 0.7.
[dt_impr_nusselt] (type: float) Keyword to print local values of Nusselt number and temperature near a wall during a turbulent calculation. The values will be printed in the _Nusselt.face file each dt_impr_nusselt time period. The local Nusselt expression is as follows : Nu = ((lambda+lambda_t)/lambda)*d_wall/d_eq where d_wall is the distance from the first mesh to the wall and d_eq is given by the wall law. This option also gives the value of d_eq and h = (lambda+lambda_t)/d_eq and the fluid temperature of the first mesh near the wall. For the Neumann boundary conditions (flux_impose), the <<equivalent>> wall temperature given by the wall law is also printed (Tparoi equiv.) preceded for VEF calculation by the edge temperature <<T face de bord>>.
[dt_impr_nusselt_mean_only] (type: dt_impr_nusselt_mean_only) This keyword is used to print the mean values of Nusselt ( obtained with the wall laws) on each boundary, into a file named datafile_ProblemName_nusselt_mean_only.out. periode refers to the printing period, this value is expressed in seconds. If you don\'t use the optional keyword boundaries, all the boundaries will be considered. If you use it, you must specify nb_boundaries which is the number of boundaries on which you want to calculate the mean values, then you have to specify their names.
[turbulence_paroi] (type: turbulence_paroi_scalaire_base) Keyword to set the wall law.