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December 28, 2009, 09:49 |
turbulence model equation
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#1 |
Member
Yi-Lang Chen
Join Date: May 2009
Posts: 58
Rep Power: 17 |
Dear experts:
Turbulence model have one equation(turbulent energy model) that have dissipation term.Another, two equation(k-e model) that e was turbulence disspation transport equation. And, what about different on dissipation term and turbulence dissipation transport equation. I studied paper. Everyone usually use one equation(turbulent energy model) to calculate turbulent energy dissipation budget. And FLOW-3D can output turbulence dissipation. But it seems different between on dissipation term and FLOW-3D output turbulence dissipation. Thanks your help! |
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December 31, 2009, 20:50 |
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#2 | |
Senior Member
michael barkhudarov
Join Date: Mar 2009
Location: Sante Fe, New Mexico, USA
Posts: 337
Rep Power: 18 |
Quote:
What difference do you see between dissipation term in the turbulent energy equation and turbulent dissipation? They are the same, aint they? |
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January 1, 2010, 04:27 |
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#3 | |
Member
Yi-Lang Chen
Join Date: May 2009
Posts: 58
Rep Power: 17 |
Quote:
Thanks your reply mike! |
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January 1, 2010, 18:55 |
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#4 |
Senior Member
michael barkhudarov
Join Date: Mar 2009
Location: Sante Fe, New Mexico, USA
Posts: 337
Rep Power: 18 |
The difference in your units is just density. Divide your turbulent transport dissipation by density and you have the same units. In any case, the two dissipations are the same quantities. In FLOW-3D turbulent dissipation has units of m^2/s^3.
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January 1, 2010, 22:45 |
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#5 |
Member
Yi-Lang Chen
Join Date: May 2009
Posts: 58
Rep Power: 17 |
Ok, I see. Thanks your help, Mike.
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