Transition Model Control

This page describes control file commands related to transition models. For instructions how to select a transition model see Turbulence Model Settings.

SetTransMinMaxIndex

Set transition minimum and maximum index. Multimode transition model will be active between specified i-indices of O-block.

Usage

SetTransMinMaxIndex <min_i> <max_i> [optionalOption]

Parameters

min_i	Minimum i index
max_i	Maximum i index

Domain

all, component, stage, group, blockGroup, block

Example

all immediate SetTransMinMaxIndex 20 80

Note

Requires axially varying mesh index to be i.

Since

7.5

SetLeadTrailEdge

Set range of x-coordinate for Multimode transition model to be active.

Usage

SetLeadTrailEdge <LE_value> <TE_value>

Parameters

LE_value	Minimum x-coordinate
TE_value	Maximum x-coordinate

Domain

all, component, stage, group, blockGroup, block

Example

all immediate SetLeadTrailEdge 1.2 1.4

Since

7.5

SetRadialTransitionRange

Set radial transition range. Multimode transition model will be active from min_k to max_k index.

Usage

SetRadialTransitionRange <min_k> <max_k> [optionalOption]

Parameters

min_k	Minimum k index
max_k	Maximum k index

Domain

all, component, stage, group, blockGroup, block

Example

all immediate SetRadialTransitionRange 20 80

Note

Requires radially varying mesh index to be k.

Since

7.5

SetBackgroundTuFactor4Entry

Set Multimode Background TurbulenceFactor for ENTRY.

Usage

SetBackgroundTuFactor4Entry <value>

Parameters

value

number between 0 and 1, default: 1.0 (exception: activated Quasi-unsteady wake model results in 0.5 as default)

Domain

all, blockGroup

Example

all immediate SetBackgroundTuFactor4Entry 0.1

Since

8.0

SetBackgroundTuFactor4Interface

Set Multimode Background TurbulenceFactor for MIXINGPLANE.

Usage

SetBackgroundTuFactor4Interface <value>

Parameters

value

number between 0 and 1, default: 0.5

Domain

all, blockGroup

Example

block i immediate SetBackgroundTuFactor4Interface 0.1

Since

8.0

UpdateTransitionModelCoefficients

Update coefficients of \(\gamma\)- \(Re_\theta\) transition model or MSC transition model. NOTE: command can only be issued at time step zero For the model formulation of \(\gamma\)- \(Re_\theta\) model see Gamma-ReTheta transition model. The model formulation of the MSC transtition model will be added soon.

Usage

UpdateTransitionModelCoefficients <identifier> <value>

Parameters

identifier	String identifying model coefficient. See table below.
value	New value for coefficient.

Identifier	Symbol	Valid for transition model
C_alpha	\(c_\alpha\)	\(\gamma\)- \(Re_\theta\)
C_a1	\(c_{a1}\)	\(\gamma\)- \(Re_\theta\)
C_e1	\(c_{e1}\)	\(\gamma\)- \(Re_\theta\)
C_a2	\(c_{a2}\)	\(\gamma\)- \(Re_\theta\)
C_e2	\(c_{e2}\)	\(\gamma\)- \(Re_\theta\)
C_thetaT	\(c_{\theta t}\)	\(\gamma\)- \(Re_\theta\)
s_1	\(s_1\)	\(\gamma\)- \(Re_\theta\)
s_2	\(s_2\)	\(\gamma\)- \(Re_\theta\)
sigma_gamma	\(\sigma_\gamma\)	\(\gamma\)- \(Re_\theta\)
sigma_ReTheta	\(\sigma_{Re_\theta}\)	\(\gamma\)- \(Re_\theta\)
Re_ThetaC1	\(c_{Re_{\theta c} 1}\)	\(\gamma\)- \(Re_\theta\)
Re_ThetaC2	\(c_{Re_{\theta c} 2}\)	\(\gamma\)- \(Re_\theta\)
F_length1	\(c_{F_\text{length} 1}\)	\(\gamma\)- \(Re_\theta\)
F_length2	\(c_{F_\text{length} 2}\)	\(\gamma\)- \(Re_\theta\)
F_length3	\(c_{F_\text{length} 3}\)	\(\gamma\)- \(Re_\theta\)
F_length4	\(c_{F_\text{length} 4}\)	\(\gamma\)- \(Re_\theta\)
TimeScaleConstant	\(c_t\)	\(\gamma\)- \(Re_\theta\)
sigma_gamma_MSC	\(\sigma_\gamma\)	MSC
sigma_ReTheta_MSC	\(\sigma_{Re_\theta}\)	MSC
CExponentGammaProduction	\(c_{P_\gamma, \text{Expo.}}\)	MSC
CScaleGammaProduction	\(c_{P_\gamma}\)	MSC
CScaleFOnset4	\(c_{F_\text{Onset4}}\)	MSC
CScaleGammaDestruction	\(c_{E_\gamma}\)	MSC
CGammaDestructionLimit	\(c_{E_\gamma , \text{Lim}}\)	MSC
CScaleReThetaProduction	\(c_{P_{\text{Re}\theta}}\)	MSC
CScaleGammaSeparationSevere	\(c_{\gamma_\text{Sep,Sev}}\)	MSC
CMaximumGammaSeparationSevere	\(c_{\gamma_\text{Sep,Sev, Max}}\)	MSC
CThresholdGammaSeparationSevere	\(c_{\gamma_\text{Sep,Sev, Thresh}}\)	MSC
CScaleGammaSeparationLight	\(c_{\gamma_\text{Sep,Light}}\)	MSC
CMaximumGammaSeparationLight	\(c_{\gamma_\text{Sep,Light, Max}}\)	MSC
CThresholdGammaSeparationLight	\(c_{\gamma_\text{Sep,Light, Thresh}}\)	MSC
CScaleAcceleration	\(c_\text{Acc}\)	MSC
CScaleDeceleration	\(c_\text{Dec}\)	MSC
CScaleReThetaC1	\(c_{\text{Re}_{\theta,\text{C1}}}\)	MSC
CScaleReThetaC2	\(c_{\text{Re}_{\theta,\text{C2}}}\)	MSC
CScaleFLength	\(c_{F_\text{Length}}\)	MSC
CScaleFLength2	\(c_{F_{\text{Length}2}}\)	MSC
CScaleTuForReTheta	\(c_\text{Tu}\)	MSC
CMaximumFOnset	\(c_{F_\text{Onset, Max}}\)	MSC
CScaleFOnset	\(c_{F_\text{Onset}}\)	MSC
CScaleCompressibleEffectsReTheta	\(c_{\text{Re}_\theta , \text{compr.}}\)	MSC
CScaleCompressibleEffectsFLength	\(c_{\text{F}_\text{Length} , \text{compr.}}\)	MSC
CScaleFReattach	\(c_{\text{F}_\text{Reattach}}\)	MSC
CExponentFOnset4	\(c_{\text{F}_\text{Onset4}, \text{Expo.}}\)	MSC

Domain

all, blockGroup

Example

all immediate UpdateTransitionModelCoefficients C_e1 3.0

Since

9.0.191