Constructive Modeling Of Structural Turbulence And Hydrodynamic Instabilities

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Автор:Belotserkovskii O.M.

Название: Constructive Modeling Of Structural Turbulence And Hydrodynamic Instabilities

Издательство: Belotserkovskii O.M. Constructive Modeling Of Structural Turbulence And Hydrodynamic Instabilities

World Scientific Publishing Co. Pte. Ltd

Год: 2009

Формат: PDF

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язык: английский

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The book provides an original approach in the research of structural analysis of free developed shear compressible turbulence at high Reynolds number on the base of direct numerical simulation (DNS) and instability evolution for ideal medium (integral conservation laws) with approximate mechanism of dissipation (FLUX dissipative monotone "upwind" difference schemes) and does not use any explicit sub-grid approximation and semi-empirical models of turbulence. Convective mixing is considered as a principal part of conservation law.

Appropriate hydrodynamic instabilities (free developed shear turbulence) are investigated from unique point of view. It is based on the concept of large ordered structures with stochastic core of small scale developed turbulence ("turbulent spot"). Decay of "turbulent spot" are simulated by Monte Carlo method. Proposed approach is based on two hypotheses: statistical independence of the characteristic of large ordered structures (LOS) and small-scale turbulence (ST) "and" weak influence of molecular viscosity (or more generally, dissipative mechanism) on properties of large ordered structures.