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-   -   How to estimate the Kolmogorov scale in the DNS of boundary layer turbulent flow? (http://www.cfd-online.com/Forums/main/83816-how-estimate-kolmogorov-scale-dns-boundary-layer-turbulent-flow.html)

hadesmajesty January 12, 2011 03:06

How to estimate the Kolmogorov scale in the DNS of boundary layer turbulent flow?
 
I know that the Kolmogorov scale can be calculated from the viscosity and dissipation rate. And the dissipation rate is of order u^3/L, where u is the fluctuating velocity and L is the integral length scale.


I know u can be obtained after simulation. However, how to determine L in downstream, wall-normal and streamwise directions?


Further, is it possible to estimate u and L in each direction in advance?

Thank you.


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