Abo Bibliothek: Guest
Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

A PRIORI ANALYSIS OF POD REDUCED ORDER MODELS FOR SIMULATION OF TURBULENT FLOWS

pages 305-310
DOI: 10.1615/TSFP2.1250
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ABSTRAKT

Different POD approaches are investigated in a priori tests for turbulent channel flow. In addition to the classical POD decomposition, in which the modes are computed in order to have an optimal representation of the L2 norm of velocity, POD bases are also obtained by maximizing either the Hε1 norm of velocity or the L2 norm of vorticity. The velocity fields reconstructed by considering an increasing number of POD modes are compared with those obtained in direct numerical simulation. The accuracy in reproducing statistical moments and near-wall structures and events is evaluated. The physical significance of the POD bases generated in the different approaches is investigated.

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