Properties
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| Freestream velocity |
U∞ |
|
[m/s] |
| Turbulence kinetic energy |
k |
|
[J/kg] = [m^2 / s^2] |
| Turbulence dissipation |
ε |
|
[J/kgs] = [m^2 / s^3] |
| Specific turbulence dissipation |
ω |
|
[1/s] |
| Turbulence intensity/level |
Tu |
|
[%] |
| Turbulence length scale |
TuL |
|
[m] |
| Kinematic viscosity |
ν |
|
[m^2/s] (Air: 1.5e-05, Water: 1E-06 at room temp & pressure) |
| Eddy viscosity ratio |
μt / μ |
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[] |
| Color codings: |
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Conversions
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ω from k and ε using β* = Cμ = 0.09, see the definition of ω for formula used
ε from k and ω using β = Cμ = 0.09, see the definition of ω for formula used
Turbulence variables (k, ε, ω) from turbulence intensity (Tu), length-scale (TuL) and freestream velocity (U∞)
Turbulence variables (k, ε, ω) from turbulence intensity (Tu), eddy viscosity ratio (μt/μ),
freestream velocity (U∞) and kinematic viscosity (ν)
Turbulence intensity (Tu) from turbulence kinetic energy (k) and freestream velocity (U∞)
Turbulence length scale (TuL) from turbulence kinetic energy (k) and dissipation (ε)
Turbulence length scale (TuL) from turbulence kinetic energy (k) and specific dissipation (ω)
Turbulence eddy viscosity ratio (μt/μ) from turbulence kinetic energy (k) and dissipation (ε)
Turbulence eddy viscosity ratio (μt/μ) from turbulence kinetic energy (k) and specific dissipation (ω)
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| Warning! Some codes (Fluent, Phoenics and CFD-ACE for example) use a different definition of the turbulence length scale than the conversion formulas used above.
See the CFD-Wiki page on turbulence length scale for more information. |
Boundary Estimations
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Turbulence intensity:
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