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Specification of Turbulence Quantities Using Profiles
If it is important to accurately represent a boundary layer or fully-developed turbulent

ow at the inlet, you should ideally set the turbulence quantities by creating a boundary
pro le le (see Section 7.26: Boundary Pro les) from experimental data or empirical
formulas. If you have an analytical description of the pro le, rather than data points,
you can either use this analytical description to create a boundary pro le le, or create a
user-de ned function to provide the inlet boundary information. (See the separate UDF
Manual for information on user-de ned functions.)
Once you have created the pro le function, you can use it as described below:
 Spalart-Allmaras model: Choose Turbulent Viscosity or Turbulent Viscosity Ratio in
the Turbulence Speci cation Method drop-down list and select the appropriate pro le
name in the drop-down list next to Turbulent Viscosity or Turbulent Viscosity Ratio.
FLUENT computes the boundary value for the modi ed turbulent viscosity, ~ , by
combining t= with the appropriate values of density and molecular viscosity.
 k- models: Choose K and Epsilon in the Turbulence Speci cation Method drop-down
list and select the appropriate pro le names in the drop-down lists next to Turb.
Kinetic Energy and Turb. Dissipation Rate.
 k-! models: Choose K and Omega in the Turbulence Speci cation Method drop-down
list and select the appropriate pro le names in the drop-down lists next to Turb.
Kinetic Energy and Spec. Dissipation Rate.
 Reynolds stress model: Choose K and Epsilon in the Turbulence Speci cation Method
drop-down list and select the appropriate pro le names in the drop-down lists
next to Turb. Kinetic Energy and Turb. Dissipation Rate. Choose Reynolds-Stress
Components in the Reynolds-Stress Speci cation Method drop-down list and select
the appropriate pro le name in the drop-down list next to each of the individual
Reynolds-stress components.
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