Direct Numerical Simulation and Analysis of 2D Turbulent Flows
Efficient methods are used to approximate incompressible Navier-Stokes equations. 2D turbulent flows are simulated in the cavity and behind arrays of cylinders in a channel. They confirm on one hand the presence of an attractor and on the other hand the coexistence of both direct enstrophy and inverse energy cascades. The use of a threshold directly on the vorticity intensity or on the wavelets packets coefficients separate the flow into two parts, each part corresponding to one cascade.
KeywordsDirect Numerical Simulation High Reynolds Number Wavelet Packet Monitoring Point Steady Solution
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