[tom.opt]

Hi All,
I'm looking at the k-mega SST equations for the value of omega in openfoam and i noticed that two different equations are used:


The standard omega= k^0.5/CMu*L
https://www.openfoam.com/documentati...omega-sst.html


And theturbulentMixingLengthFrequencyInlet
https://www.openfoam.com/documentati...frequency.html


where omega is defined as omega =Cmu^0.75* k^1.5/L


My question is why there are two different definitions of omega and which is correct to use for turbo-machinery internal flows?

[fsaltara]

(k^3/2*cmu^3/4)/L is the expression for epsilon. Using SI units, it results m^2/s^3.


And I think that the other expression is wrong. Omega is equal to epsilon/(cmu*k). So, omega=k^1/2/(cmu^1/4*L). This expression results s^-1 in SI units.

[tom.opt]

Originally Posted by tom.opt

Hi All,
I'm looking at the k-mega SST equations for the value of omega in openfoam and i noticed that two different equations are used:


The standard omega= k^0.5/CMu*L
https://www.openfoam.com/documentati...omega-sst.html


And theturbulentMixingLengthFrequencyInlet
https://www.openfoam.com/documentati...frequency.html


where omega is defined as omega =Cmu^0.75* k^1.5/L


My question is why there are two different definitions of omega and which is correct to use for turbo-machinery internal flows?

So i just rechecked those links and it seems that the formulas have been updated and now the same formulas are shown on both links