9781848213951

Transport and Coherent Structures in Wall Turbulence

by
  • ISBN13:

    9781848213951

  • ISBN10:

    1848213956

  • Format: Hardcover
  • Copyright: 5/12/2014
  • Publisher: Iste/Hermes Science Pub
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Summary

Huge progress on wall bounded shear flows has been achieved in the past two decades. The salient progress in the field was the discovery of the wall coherence in the early 1960's. Several hundreds of papers have been published since, but there is no publication that presents this colossal amount of work in a comprehensive way. This book presents recent progresses in this area. Contents includes:- Introduction and basic concepts; Transport in wall bounded turbulent flows; Dissipation and its modeling in the inner layer; Near wall closures; Wall coherent structures and their one and multi-point detection; Genesis of coherent wall structures, streak instability, regeneration of wall quasi-streamwise vortices, self-sustaining mechanism, quasi-deterministic approach; Packets and very large structures; Dynamical system approach to wall turbulence, proper orthogonal decomposition, low order wall models, chaotic synchronization with impact to wall turbulence control.

Table of Contents

Chapter 1: Introduction and basic concepts

Chapter 2: Transport in wall bounded turbulent flows (Reynolds shear stress transport equations, rapid and slow terms, pressure fluctuations)

Chapter 3: Dissipation (Kolmogoroff scale distribution near the wall; Modeling dissipation in the inner layer; Zero-crossings and Liepmann scale.

Chapter 4: Closures (one and multi point closures in wall bounded turbulent flows)

Chapter 5: Wall coherent structures and their detection (historical outline of the discovery of wall coherence, streaks, quasi-streamwise vortices, one point detection (VITA, u, modified u-level and quadrant analysis, conditional averaging, Q2 and Lambda2 techniques).

Chapter 6: Genesis of coherent wall structures (streak instability, regeneration of wall quasi-streamwise vortices, self-sustaining mechanism, quasi-deterministic approach)

Chapter 7: Packets and very large structures (regeneration of packets of quasi-streamwise vortices and their amalgamation into very large outer structures; their comprehension and dynamical impact on the wall turbulence).

Chapter 8: Dynamical system approach to wall turbulence (proper orthogonal decomposition, low order wall models, chaotic synchronization with impact to wall turbulence control).

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