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- - **How to estimate the Kolmogorov scale in the DNS of boundary layer turbulent flow?**
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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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