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LES best practice: resolved and modelled turbulence kinetic energy |
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#21 |
Senior Member
Arijit Saha
Join Date: Feb 2019
Location: Singapore
Posts: 132
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Thanks a lot for clarifying, it really helped me a lot. And last thing does that 1/2 denotes square root?
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#22 |
Senior Member
Arijit Saha
Join Date: Feb 2019
Location: Singapore
Posts: 132
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Thanks for the reply and it really clarified my doubt. One last thing to ask doesnt these 1/2 gets deducted from numerator and denomerator?
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#23 |
New Member
Emily
Join Date: Nov 2017
Posts: 24
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You should multiply by 1/2, as the turbulent kinetic energy is given by 0.5*trace(Reynolds stress tensor).
But you are correct, in this case as we are taking the ratio of kinetic energies the 0.5 will drop out of the equation. So to find the ratio of modelled to total turbulent kinetic energy use the following equation tr(R) / (tr(R) + tr(UPrime2Mean)) I hope this helps! |
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