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Transport and coherent structures in wall turbulence /
Wall bounded turbulent flows are of major importance in industrial and environmental fluid mechanics. The structure of the wall turbulence is intrinsically related to the coherent structures that play a fundamental role in the transport process. The comprehension of their regeneration mechanism is i...
| Clasificación: | Libro Electrónico |
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| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
London :
ISTE Ltd,
2014.
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| Colección: | Fluid mechanics series.
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| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Cover page; Half-Title page; Title page; Copyright page; Contents; Introduction; Main Notations; Roman letters; Subscript and superscript notation; Vectorial operators; Greek symbols; Abbreviations; 1: General Points; 1.1. Introduction; 1.2. General equations; 1.2.1. Eulerian relations; 1.2.1.1. Continuity equation; 1.2.1.2. Momentum balance equations; 1.3. Notations; 1.4. Reynolds equations; 1.5. Exact relations in a fully developed turbulent channel flow; 1.6. Equations for a turbulent boundary layer; 1.7. Scales in a wall-bounded turbulent flow; 1.8. Eddy viscosity closures.
- 1.9. Turbulent intensities of the velocity components1.10. Fine structure; 1.11. Vorticity; 1.11.1. Characteristics of vorticity field near to the wall; 1.11.2. Turbulent intensities of the fluctuating vorticity components; 2: Transport Phenomena in Wall Turbulence; 2.1. Introduction; 2.2. Transport equations; 2.3. Models of return to isotropy; 2.4. Transport of turbulent kinetic energy; 2.5. Transport of the velocity gradient; 2.6. Transport of the Reynolds stress -uv; 2.7. Effects of the Reynolds number on transport; 2.8. Dissipation; 2.8.1. Dissipation of kinetic energy.
- 2.8.2. Dissipation linked to the transport equations for the Reynolds stresses2.9. Pressure; 2.9.1. Wall pressure; 2.9.2. Spectral density; 2.9.3. Decomposition into slow and rapid components; 2.10. Anisotropy; 2.11. Rapid distortion; 3: Near-Wall Coherent Structures: History, Identification and Detection; 3.1. Introduction; 3.2. History; 3.3. Single-point Eulerian detection; 3.3.1. Detection in quadrant II; 3.3.2. Detection by the u-level (u-l); 3.3.3. Detection by VITA and VISA; 3.4. Stochastic estimation; 3.5. Wavelets and wall turbulence; 3.6. Critical points and topology.
- 4.2. Structural morphology of wall turbulence. Quasi-streamwise vortices or hairpin vortices?4.3. Frequency distribution of energetic events in the inner sublayer; 4.4. Quadrant-based structure of the Reynolds shear stress; 4.5. Streaks; 4.6. Wavelet analysis, at low Reynolds numbers, of the vorticity layers surrounding the streaks; 4.7. Effect of coherent structures on local wall friction; 4.8. Effect of coherent structures on wall pressure; 4.9. Active and passive structures; 4.10 Particle trajectories: Lagrangian approach; 4.10.1. Lagrangian description and transport by turbulent diffusion.