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-   -   LES of periodic pipe centerline turbulent kinetic energy (http://www.cfd-online.com/Forums/openfoam/82625-les-periodic-pipe-centerline-turbulent-kinetic-energy.html)

smehdi609 December 1, 2010 00:59

LES of periodic pipe centerline turbulent kinetic energy
 
Hi Everyone,
I did an LES simulation of a periodic pipe (D=5mm) with channelOodles for the inlet condition of another LES simulation at Re=30,000. The averaged center-line turbulent kinetic energy is 1.5 which is much lower than the experimental value which is 3.85. The computed averaged turbulent kinetic energy is a spatial average in the periodic direction using the obtained LES velocity field. The sub-grid scale turbulent kinetic energy is of order of 0.15 which is negligible.
The length of pipe is 5D.
I was wondering if anyone knows where this anomaly comes from.


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