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Linear and Nonlinear Dynamics of Localized Disturbances in Three‐dimensional Boundary Layers
Author(s) -
Stoynov M.I.,
Oertel H.
Publication year - 2002
Publication title -
zamm ‐ journal of applied mathematics and mechanics / zeitschrift für angewandte mathematik und mechanik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 51
eISSN - 1521-4001
pISSN - 0044-2267
DOI - 10.1002/1521-4001(200210)82:10<685::aid-zamm685>3.0.co;2-j
Subject(s) - laminar flow , nonlinear system , turbulence , discretization , compressibility , mechanics , mathematics , boundary (topology) , navier–stokes equations , boundary layer , physics , mathematical analysis , classical mechanics , quantum mechanics
Linear and nonlinear dynamics of localized disturbances in laminar incompressible two‐ and three‐dimensional boundary layers was investigated using the temporal direct numerical simulation. Laminar base profiles were computed with a Runge‐Kutta block‐structured finite volume software package. The time evolution of localized disturbances have been computed using the periodical model in stream‐ and spanwise directions. Pseudospectral methods were applied for the space discretization of the incompressible Navier‐Stokes equations. All stages of time‐evolution of the disturbances from linear to nonlinear (saturated) stage were examined, turbulent velocity profiles and r.m.s. velocity fluctuations have been computed at saturated stages.