Kolmogorov microscales
E1041766
Kolmogorov microscales are the smallest characteristic length, time, and velocity scales in turbulent flow at which viscous dissipation of kinetic energy dominates.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
fluid dynamics concept
ⓘ
turbulence scale ⓘ |
| appliesTo |
high Reynolds number flows
ⓘ
incompressible turbulence ⓘ |
| assumption |
existence of an inertial subrange
ⓘ
local isotropy at small scales ⓘ statistical homogeneity at small scales ⓘ |
| characteristicOf | fully developed turbulence ⓘ |
| dependsOn |
kinematic viscosity
ⓘ
mean energy dissipation rate per unit mass ⓘ |
| describes | smallest scales of turbulent motion ⓘ |
| dimensionOfLengthScale | length ⓘ |
| dimensionOfTimeScale | time ⓘ |
| dimensionOfVelocityScale | velocity ⓘ |
| dominantProcess | viscous dissipation of kinetic energy ⓘ |
| energyTransferProperty |
convert kinetic energy into heat
ⓘ
receive energy from inertial subrange ⓘ |
| field |
fluid dynamics
ⓘ
turbulence theory ⓘ |
| hasComponent |
Kolmogorov length scale
NERFINISHED
ⓘ
Kolmogorov time scale NERFINISHED ⓘ Kolmogorov velocity scale NERFINISHED ⓘ |
| independentOf | large scale flow geometry under Kolmogorov hypotheses ⓘ |
| introducedBy | Andrey Kolmogorov NERFINISHED ⓘ |
| introducedIn | 1941 ⓘ |
| lengthScaleFormula | η = (ν³/ε)^(1/4) ⓘ |
| namedAfter | Andrey Kolmogorov NERFINISHED ⓘ |
| regime | viscous subrange of turbulence spectrum ⓘ |
| relatedConcept |
Taylor microscale
ⓘ
integral length scale ⓘ |
| relatedTo |
Kolmogorov 1941 theory
NERFINISHED
ⓘ
Kolmogorov similarity hypotheses NERFINISHED ⓘ |
| roleIn |
closure models for turbulence
ⓘ
direct numerical simulation resolution requirements ⓘ turbulence modeling ⓘ |
| scaleRange | smallest dynamically relevant scales in turbulent flow ⓘ |
| spectralProperty | associated with high wavenumber end of energy spectrum ⓘ |
| symbolForLengthScale | η ⓘ |
| symbolForTimeScale | τη ⓘ |
| symbolForVelocityScale | uη ⓘ |
| timeScaleFormula | τη = (ν/ε)^(1/2) ⓘ |
| typicalOrderOfMagnitude | much smaller than integral scale in high Reynolds number flows GENERATED ⓘ |
| usedFor |
designing experimental measurements in turbulence
ⓘ
estimating smallest eddy size ⓘ grid spacing selection in DNS ⓘ |
| velocityScaleFormula | uη = (νε)^(1/4) ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.