Collaboration diagram for turbulence options:

Variables
integer(c_int), pointer, save	iturb

integer(c_int), pointer, save	itytur
	Class of turbulence model (integer value iturb/10) More...

integer(c_int), pointer, save	irccor
	Activation of rotation/curvature correction for eddy viscosity turbulence models. More...

integer(c_int), pointer, save	itycor
	Type of rotation/curvature correction for eddy viscosity turbulence models. More...

integer(c_int), pointer, save	idirsm
	Turbulent diffusion model for second moment closure. More...

integer(c_int), pointer, save	iwallf
	Wall functions Indicates the type of wall function used for the velocity boundary conditions on a frictional wall. More...

integer(c_int), pointer, save	iwalfs
	Wall functions for scalar. More...

integer(c_int), pointer, save	iwallt
	exchange coefficient correlation More...

integer(c_int), pointer, save	iclkep
	Indicates the clipping method used for and $\varepsilon$ , for the $k-\epsilon$ and v2f models. More...

integer(c_int), pointer, save	igrhok
	Indicates if the term $\frac{2}{3}\grad \rho k$ is taken into account in the velocity equation. More...

integer(c_int), pointer, save	igrake
	Indicates if the terms related to gravity are taken into account in the equations of $k-\epsilon$ . More...

integer(c_int), pointer, save	igrari
	Indicates if the terms related to gravity are taken into account in the equations of $R_{ij}-\varepsilon$ . More...

integer(c_int), pointer, save	ikecou
	Indicates if the coupling of the source terms of and $\epsilon$ or and $\omega$ is taken into account or not. More...

integer(c_int), pointer, save	reinit_turb
	Advanced re-init for EBRSM and k-omega models. More...

integer(c_int), pointer, save	irijco
	Coupled solving of $\tens{R}$ . More...

integer(c_int), pointer, save	iddes
	Activation of Hybrid DDES model (only valid for iturb equal to 60) More...

integer(c_int), pointer, save	irijnu
	pseudo eddy viscosity in the matrix of momentum equation to partially implicit $\divv \left( \rho \tens{R} \right)$ More...

integer(c_int), pointer, save	irijrb
	accurate treatment of $\tens{R}$ at the boundary (see condli) More...

integer(c_int), pointer, save	irijec
	Indicates if the wall echo terms in $R_{ij}-\epsilon$ LRR model are taken into account: More...

integer(c_int), pointer, save	idifre
	whole treatment of the diagonal part of the dissusion tensor of $\tens{R}$ and $\varepsilon$ More...

integer(c_int), pointer, save	iclsyr
	partial implicitation of symmetry BCs of $\tens{R}$ More...

integer(c_int), pointer, save	iclptr
	partial implicitation of wall BCs of $\tens{R}$ More...

integer(c_int), pointer, save	idries
	Activates or the van Driest wall-damping for the Smagorinsky constant (the Smagorinsky constant is multiplied by the damping function $1-e^{-y^+/ cdries}$ , where designates the non-dimensional distance to the nearest wall). More...

integer(c_int), pointer, save	ivrtex
	Activates or not the generation of synthetic turbulence at the different inlet boundaries with the LES model (generation of unsteady synthetic eddies). . More...

integer, save	ikwcln
	Wall boundary condition on omega in k-omega SST 0: Deprecated Neumann boundary condition 1: Dirichlet boundary condition consistent with Menter's original model: w_wall = 60nu/(betad**2) More...

integer, dimension(nscamx), save	iturt
	turbulent flux model for $\overline{\varia^\prime \vect{u}^\prime}$ for any scalar $\varia$ , iturt(isca) More...

integer, dimension(nscamx), save	ityturt
	class turbulent flux model (=iturt/10) More...

integer, save	nvarcl
	number of variable (deprecated, used only for compatibility) More...

Detailed Description

Variable Documentation

◆ iclkep

integer(c_int), pointer, save iclkep

Indicates the clipping method used for $k$ and $\varepsilon$ , for the $k-\epsilon$ and v2f models.

0: clipping in absolute value
1: coupled clipping based on physical relationships
Useful if and only if iturb = 20, 21 or 50 ( $k-\epsilon$ and v2f models). The results obtained with the method corresponding to iclkep =1 showed in some cases a substantial sensitivity to the values of the length scale almax.
The option iclkep = 1 is therefore not recommended, and, if chosen, must be used cautiously.

◆ iclptr

integer(c_int), pointer, save iclptr

partial implicitation of wall BCs of $\tens{R}$

1: true
0: false (default)

◆ iclsyr

integer(c_int), pointer, save iclsyr

partial implicitation of symmetry BCs of $\tens{R}$

1: true (default)
0: false

◆ iddes

integer(c_int), pointer, save iddes

Activation of Hybrid DDES model (only valid for iturb equal to 60)

◆ idifre

integer(c_int), pointer, save idifre

whole treatment of the diagonal part of the dissusion tensor of $\tens{R}$ and $\varepsilon$

1: true (default)
0: simplified treatment

◆ idirsm

integer(c_int), pointer, save idirsm

Turbulent diffusion model for second moment closure.

0: scalar diffusivity (Shir model)
1: tensorial diffusivity (Daly and Harlow model, default model)

◆ idries

integer(c_int), pointer, save idries

Activates or the van Driest wall-damping for the Smagorinsky constant (the Smagorinsky constant is multiplied by the damping function $1-e^{-y^+/ cdries}$ , where $y^+$ designates the non-dimensional distance to the nearest wall).

1: true
0: false The default value is 1 for the Smagorinsky model and 0 for the dynamic model.
The van Driest wall-damping requires the knowledge of the distance to the nearest wall for each cell in the domain. Refer to keyword icdpar for potential limitations.
Useful if and only if iturb = 40 or 41

◆ igrake

integer(c_int), pointer, save igrake

Indicates if the terms related to gravity are taken into account in the equations of $k-\epsilon$ .

1: true (default if $\rho$ is variable)
0: false Useful if and only if iturb = 20, 21, 50 or 60 and (gx, gy, gz}) $\ne$ (0,0,0) and the density is not uniform.

◆ igrari

integer(c_int), pointer, save igrari

Indicates if the terms related to gravity are taken into account in the equations of $R_{ij}-\varepsilon$ .

1: true (default if $\rho$ is variable)
0: false Useful if and only if iturb = 30 or 31 and (gx, gy, gz}) $\ne$ (0,0,0) ( $R_{ij}-\epsilon$ model with gravity) and the density is not uniform.

◆ igrhok

integer(c_int), pointer, save igrhok

Indicates if the term $\frac{2}{3}\grad \rho k$ is taken into account in the velocity equation.

1: true
0: false in the velocity
Useful if and only if iturb = 20, 21, 50 or 60.
This term may generate non-physical velocities at the wall. When it is not explicitly taken into account, it is implicitly included into the pressure.

◆ ikecou

integer(c_int), pointer, save ikecou

Indicates if the coupling of the source terms of $k$ and $\epsilon$ or $k$ and $\omega$ is taken into account or not.

1: true,
0: false
If ikecou = 0 in $k-\epsilon$ model, the term in $\epsilon$ in the equation of is made implicit.
ikecou is initialised to 0 if iturb = 21 or 60, and to 1 if iturb = 20.
ikecou = 1 is forbidden when using the v2f model (iturb = 50).
Useful if and only if iturb = 20, 21 or 60 ( $k-\epsilon$ and $k-\omega$ models)

◆ ikwcln

integer, save ikwcln

Wall boundary condition on omega in k-omega SST 0: Deprecated Neumann boundary condition 1: Dirichlet boundary condition consistent with Menter's original model: w_wall = 60*nu/(beta*d**2)

◆ irccor

integer(c_int), pointer, save irccor

Activation of rotation/curvature correction for eddy viscosity turbulence models.

0: false
1: true

◆ irijco

integer(c_int), pointer, save irijco

Coupled solving of $\tens{R}$ .

1: true
0: false (default)

◆ irijec

integer(c_int), pointer, save irijec

Indicates if the wall echo terms in $R_{ij}-\epsilon$ LRR model are taken into account:

1: true,
0: false (default)
Useful if and only if iturb = 30 ( $R_{ij}-\epsilon$ LRR).
It is not recommended to take these terms into account: they have an influence only near the walls, their expression is hardly justifiable according to some authors and, in the configurations studied with Code_Saturne, they did not bring any improvement in the results.
In addition, their use induces an increase in the calculation time.
The wall echo terms imply the calculation of the distance to the wall for every cell in the domain. See icdpar for potential restrictions due to this.

◆ irijnu

integer(c_int), pointer, save irijnu

pseudo eddy viscosity in the matrix of momentum equation to partially implicit $\divv \left( \rho \tens{R} \right)$

1: true
0: false (default) The goal is to improve the stability of the calculation. The usefulness of irijnu = 1 has however not been clearly demonstrated.
Since the system is solved in incremental form, this extra turbulent viscosity does not change the final solution for steady flows. However, for unsteady flows, the parameter nswrsm should be increased.
Useful if and only if iturb = 30 or 31 ( $R_{ij}-\epsilon$ model).

◆ irijrb

integer(c_int), pointer, save irijrb

accurate treatment of $\tens{R}$ at the boundary (see condli)

1: true
0: false (default)

◆ iturb

integer(c_int), pointer, save iturb

turbulence model

0: no turbulence model (laminar flow)
10: mixing length model
20: standard $k-\varepsilon$ model
21: $k-\varepsilon$ model with Linear Production (LP) correction
30: $R_{ij}-\epsilon$ (LRR)
31: $R_{ij}-\epsilon$ (SSG)
32: $R_{ij}-\epsilon$ (EBRSM)
40: LES (constant Smagorinsky model)
41: LES ("classical" dynamic Smagorisky model)
42: LES (WALE)
50: v2f phi-model
51: v2f
60: $k-\omega$ SST
70: Spalart-Allmaras model

◆ iturt

integer, dimension(nscamx), save iturt

turbulent flux model for $\overline{\varia^\prime \vect{u}^\prime}$ for any scalar $\varia$ , iturt(isca)

0: SGDH
10: GGDH
11: EB-GGDH (Elliptic Blending)
20: AFM
21: EB-AFM (Elliptic Blending)
30: DFM (Transport equation modelized)
31: EB-DFM (Elliptic Blending) GGDH, AFM and DFM are only available when a second order closure is used.

◆ itycor

integer(c_int), pointer, save itycor

Type of rotation/curvature correction for eddy viscosity turbulence models.

1 Cazalbou correction (default when irccor=1 and itytur=2 or 5)
2 Spalart-Shur correction (default when irccor=1 and iturb=60 or 70)

◆ itytur

integer(c_int), pointer, save itytur

Class of turbulence model (integer value iturb/10)

◆ ityturt

integer, dimension(nscamx), save ityturt

class turbulent flux model (=iturt/10)

◆ ivrtex

integer(c_int), pointer, save ivrtex

Activates or not the generation of synthetic turbulence at the different inlet boundaries with the LES model (generation of unsteady synthetic eddies).
.

1: true
0: false (default) Useful if iturb =40, 41 or 42
This keyword requires the completion of the routine usvort

◆ iwalfs

integer(c_int), pointer, save iwalfs

Wall functions for scalar.

0: three layer wall function of Arpaci and Larsen
1: Van Driest wall function

◆ iwallf

integer(c_int), pointer, save iwallf

Wall functions Indicates the type of wall function used for the velocity boundary conditions on a frictional wall.

0: no wall functions
1: one scale of friction velocities (power law)
2: one scale of friction velocities (log law)
3: two scales of friction velocities (log law)
4: two scales of friction velocities (log law) (scalable wall functions)
5: two scales of friction velocities (mixing length based on V. Driest analysis)
iwallf is initialised to 2 for iturb = 10, 40, 41 or 70 (mixing length, LES and Spalart Allmaras).
iwallf is initialised to 0 for iturb = 0, 32, 50 or 51
iwallf is initialised to 3 for iturb = 20, 21, 30, 31 or 60 ( $k-\epsilon$ , $R_{ij}-\epsilon$ LRR, $R_{ij}-\epsilon$ SSG and $k-\omega$ SST models).
The v2f model (iturb=50) is not designed to use wall functions (the mesh must be low Reynolds).
The value iwallf = 3 is not compatible with iturb=0, 10, 40 or 41 (laminar, mixing length and LES).
Concerning the $k-\epsilon$ and $R_{ij}-\epsilon$ models, the two-scales model is usually at least as satisfactory as the one-scale model.
The scalable wall function allows to virtually shift the wall when necessary in order to be always in a logarithmic layer. It is used to make up for the problems related to the use of High-Reynolds models on very refined meshes.
Useful if iturb is different from 50.

◆ iwallt

integer(c_int), pointer, save iwallt

exchange coefficient correlation

0: not use by default
1: exchange coefficient computed with a correlation

◆ nvarcl

integer, save nvarcl

number of variable (deprecated, used only for compatibility)

◆ reinit_turb

integer(c_int), pointer, save reinit_turb

Advanced re-init for EBRSM and k-omega models.

1: true
0: false (default)

Variables