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December 13, 2017, 08:16 |
tke and eps values
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#1 |
New Member
Hamed
Join Date: May 2017
Posts: 26
Rep Power: 8 |
Hi,
What should I do to calculate the exact tke and eps at the inflow and outflow of engine? Based on what computations (hydraulic diameter) did you enter tke and eps in your example (SAGE-pfi)? In my case, the inlet and outlet are not open to the same conditions. similarly, how to calculate these values for injector simulation? Best regards, Hamed |
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December 13, 2017, 17:49 |
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#2 |
Member
Tristan Burton
Join Date: Sep 2017
Posts: 92
Rep Power: 8 |
Hamed,
Typically the turbulence intensity is specified depending on the anticipated turbulence level for your application: - High turbulence flow: 0.05 to 0.20 - Medium turbulence flow: 0.01 to 0.05 - Low turbulence flow: < 0.01 and a turbulent length scale is also selected, usually 5-10% of the hydraulic diameter. Together, the turbulence intensity and turbulent length scale set k and epsilon at the boundary. Please see the slides from the Boundaries and Boundary Conditions lecture of the CONVERGE introductory training for more details. Best regards, Tristan |
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