Blending Function for DES model

desbf

[ ]

2

C, M, R, TS

Controls blending between RANS and LES regimes for the DES model

Turbulence Kinetic Energy

ke

[m^2 s^-2]

1

A, C, M, P, R, TS

For details, see The k-epsilon Model in the CFX-Solver Modeling Guide.

Turbulence Eddy Dissipation

ed

[m^2 s^-3]

1

A, C, M, P, R, TS

The rate at which the velocity fluctuations dissipate. For details, see The k-epsilon Model in the CFX-Solver Modeling Guide.

Turbulent Eddy Frequency

tef

[s^-1]

1

A, C, M, P, R, TS

Eddy Viscosity

eddy viscosity

[kg m^-1 s-1]

2

A, C, M, P, R, TS

The "eddy viscosity model" proposes that turbulence consists of small eddies that are continuously forming and dissipating, and in which the Reynolds stresses are assumed to be proportional to mean velocity gradients. For details, see Eddy Viscosity Turbulence Models in the CFX-Solver Theory Guide.

Reynolds Stress

rs

[m^2 s^-2]

2

A, C, M, P, R, TS

This is a tensor quantity with six components. For details, see Statistical Reynolds Stresses in the CFX-Solver Modeling Guide and Reynolds Stress Turbulence Models in the CFX-Solver Theory Guide in the Ansys CFX documentation.

Statistical Reynolds Stress uu

rsstat uu

[m^2 s^-2]

3

M, R

In LES runs, Reynolds Stress components are automatically generated using running statistics of the instantaneous, transient velocity field. For details, see Statistical Reynolds Stresses in the CFX-Solver Modeling Guide.

Statistical Reynolds Stress vv

rsstat vv

[m^2 s^-2]

3

M, R

Statistical Reynolds Stress ww

rsstat ww

[m^2 s^-2]

3

M, R

Statistical Reynolds Stress uv

rsstat uv

[m^2 s^-2]

3

M, R

Statistical Reynolds Stress uw

rsstat uw

[m^2 s^-2]

3

M, R

Statistical Reynolds Stress vw

rsstat vw

[m^2 s^-2]

3

M, R

Velocity Correlation uu

uu

[m^2 s^-2]

3

C, M, R

These variables represent the instantaneous velocity correlation and are used in the first term on the right hand side of Equation 4–10 in the CFX-Solver Modeling Guide.

Velocity Correlation vv

vv

[m^2 s^-2]

3

C, M, R

Velocity Correlation ww

ww

[m^2 s^-2]

3

C, M, R

Velocity Correlation uv

uv

[m^2 s^-2]

3

C, M, R

Velocity Correlation uw

uw

[m^2 s^-2]

3

C, M, R

Velocity Correlation vw

vw

[m^2 s^-2]

3

C, M, R

Yplus

yplusstd

[ ]

2,B

C, R, TS

A variable based on the distance from the wall to the first node and the wall shear stress. For details, see Solver Yplus and Yplus in the CFX-Solver Modeling Guide.

Solver Yplus

yplus

[ ]

2,B

C, R, TS

A deprecated internal variable. For details, see Solver Yplus and Yplus in the CFX-Solver Modeling Guide.