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Blowing up in the DNS of boundary layer transition

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Old   March 28, 2011, 08:35
Default Blowing up in the DNS of boundary layer transition
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AS the disturbance wave propagates to the high Reynolds number region where breaking down to turbulence occurs, my algorithm starts to blow up. I am using finite difference methods in downstream and wall-normal direction and spectral method in spanwise direction, and explicit RK method for temporal integration. I notice before the blowing up, there are strong oscillations in the near wall region. So I double it may be due to the poor resolution in the wall-normal direction or the violation of CFL condition in that region. Anyone has a clue? Thank you.
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