Transport Model Control

This page describes control file commands for numerical settings of transport equations. Transport equations are used for turbulence and transition models.

StartScalarTransportEq

Starts specified number of scalar transport equations embedded in the TRANSPORT_GENERIC transport model. Further settings can be made in the specified file. An example of such a file is given below.

Usage

StartScalarTransportEq <numberOfVariables> <filename>

Parameters

numberOfVariables	Number of transport variables to be created.
filename	Path to file with definition of transported variables.

Domain

all, blockGroup

Example

all immediate StartScalarTransportEq 3 species.def

The definition file can be used to do the following:

• Declaration of variable names (passive scalars):

  phi1    Passive
  phi2    Passive
  phi3    Passive

• Set free stream values:

  #Free stream data
  FreeStream
  phi1   phi2   phi3
  0.0   0.0   0.0

• Set global panel values, select panel by name:

  #Inflow
  PANEL Left
  phi1   phi2   phi3
  0.0   1.0   0.0

• Set initial values for all blocks (the value of the block argument must be -1). In earlier versions it was allowed to set the init values per block, this is no longer possible:

  InitialValues BLOCK -1
  phi1   phi2   phi3
  0.0   0.0   0.0
  InitialValues BLOCK -1
  phi1   phi2   phi3
  0.0   0.0   0.0
  InitialValues BLOCK -1
  phi1   phi2   phi3
  0.0   1.0   0.0
  InitialValues BLOCK -1
  phi1   phi2   phi3
  0.0   1.0   0.0

Since

7.5

ChangeScalarTransportAttr

Change numerical settings for transport equations. Identical settings are applied to all scalar equations of the COUPLED model. In this case, variables do not need to be specified.

Usage

ChangeScalarTransportAttr [option]

Long option	Short option	Arguments	Description	Added	Restrictions
--model	-m	One of TRANSITION, TURBULENCE, UPSTREAM_DS, WALLDIST, COUPLED, TRANSPORT_GENERIC	Choose type of transport model for which changes should be applied	8.0.59
--variable	-var	List of variable names	Choose specific variables for which changes should be applied	8.0.59
--equation	-eqn	List of equation numbers	Choose specific equation numbers (0-based) for which changes should be applied	8.0.59
--convectionScheme	-convScheme	One of FullyUpwind, FrommScheme, ThirdOrderUpwind, QuickScheme	Scheme for reconstruction of face values.	8.0.59
--limiter	-l	One of Off, Minmod, VanAlbadaSqr, VanAlbada2Sqr, VanAlbada, VanAlbada2, VanLeer	Limiter for reconstruction of face values.	8.0.59
--gradLimiter	-gl	One of Off, BarthJesperson, Venkatakrishnan	Gradient limiter for unstructured topology.	8.0.59
--spaceAccuracy	-spAccuracy	One of 1stOrder, 2ndOrder, 3rdOrder, 4thOrder, 5thOrder	Spatial accuracy.	8.0.59	Second order with TransportEquationFluxCorrection can only be selected if Navier-Stokes equations are solved with second order.
--adaptedMuscl	-adMuscl	ON, OFF	MUSCL scheme considering cell sizes.	9.0.150	Only available for 2nd order spatial discretisation in non-linear time-domain solver. Not available for hybrid RANS-LES models.
--schmidtNumbers	-sn	Molecular and turbulent Schmidt numbers (default \(Sc = Sc_T = 1\))	Change molecular and turbulent Schmidt numbers \(Sc\) and \(Sc_T\) (Scalar transport equations).	9.0.191	Only available for generic transport model.

--solutionMethod | -sm | ILU, SSOR | Select solution algorithm for equation system. | 9.3.XXX | |

Domain

all, blockGroup

Example

all immediate ChangeScalarTransportAttr --model TURBULENCE --spaceAccuracy 1stOrder
all immediate ChangeScalarTransportAttr --model TURBULENCE --variable TurbulentDissipationRate --limiter Minmod
all immediate ChangeScalarTransportAttr --variable phi1 --schmidtNumbers 0.5 0.7

TransportEquationFluxCorrection

Switch flux correction for second order convective terms of transport equations on or off. By default the correction is active.

Usage

TransportEquationFluxCorrection <ON|OFF>

Domain

all, blockGroup

Example

all immediate TransportEquationFluxCorrection OFF

Since

7.7.84