Structure of Turbulence and Drag Reduction PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Structure of Turbulence and Drag Reduction PDF full book. Access full book title Structure of Turbulence and Drag Reduction by Albert Gyr. Download full books in PDF and EPUB format.
Author: Albert Gyr
Publisher: Springer Science & Business Media
ISBN: 3642509711
Category : Science
Languages : en
Pages : 617
Get Book Here
Book Description
In 1976 a similar titled IUTAM Symposium (Structure of Turbulence and Drag Reduction) was held in Washington . However, the progress made during the last thirteen years as weil as the much promising current research desired a second one this year. In Washington drag reduction by additives and by direct manipulation of the walls (compliant walls and heated surfaces) were discussed. In the meantime it became evident that drag reduction also occurs when turbulence is influenced by geometrical means, e.g. by influencing the pressure distribution by the shape of the body (airfoils) or by the introduction of streamwise perturbances on a body (riblets). In the recent years turbulence research has seen increasing attention being focused on the investigation of coherent structures, mainly in Newtonian fluids. We all know that these structures are a significant feature of turbulent flows, playing an important role in the energy balance in such flows. However their place in turbulence theories as weil as the factors influencing their development are still poorly understood. Consequently, the investigation of phenomena in which the properties of coherent structures are alte red provides a promising means of improving our understanding of turbulent flows in general.
Author: Albert Gyr
Publisher: Springer Science & Business Media
ISBN: 3642509711
Category : Science
Languages : en
Pages : 617
Get Book Here
Book Description
In 1976 a similar titled IUTAM Symposium (Structure of Turbulence and Drag Reduction) was held in Washington . However, the progress made during the last thirteen years as weil as the much promising current research desired a second one this year. In Washington drag reduction by additives and by direct manipulation of the walls (compliant walls and heated surfaces) were discussed. In the meantime it became evident that drag reduction also occurs when turbulence is influenced by geometrical means, e.g. by influencing the pressure distribution by the shape of the body (airfoils) or by the introduction of streamwise perturbances on a body (riblets). In the recent years turbulence research has seen increasing attention being focused on the investigation of coherent structures, mainly in Newtonian fluids. We all know that these structures are a significant feature of turbulent flows, playing an important role in the energy balance in such flows. However their place in turbulence theories as weil as the factors influencing their development are still poorly understood. Consequently, the investigation of phenomena in which the properties of coherent structures are alte red provides a promising means of improving our understanding of turbulent flows in general.
Author: François N. Frenkiel
Publisher:
ISBN:
Category : Frictional resistance (Hydrodynamics)
Languages : en
Pages : 314
Get Book Here
Book Description
Author: Chaoqun Liu
Publisher: Academic Press
ISBN: 0128190248
Category : Technology & Engineering
Languages : en
Pages : 460
Get Book Here
Book Description
Liutex and Its Applications in Turbulence Research reviews the history of vortex definition, provides an accurate mathematical definition of vortices, and explains their applications in flow transition, turbulent flow, flow control, and turbulent flow experiments. The book explains the term "Rortex" as a mathematically defined rigid rotation of fluids or vortex, which could help solve many longstanding problems in turbulence research. The accurate mathematical definition of the vortex is important in a range of industrial contexts, including aerospace, turbine machinery, combustion, and electronic cooling systems, so there are many areas of research that can benefit from the innovations described here. This book provides a thorough survey of the latest research in generalized and flow-thermal, unified, law-of-the-wall for wall-bounded turbulence. Important theory and methodologies used for developing these laws are described in detail, including: the classification of the conventional turbulent boundary layer concept based on proper velocity scaling; the methodology for identification of the scales of velocity, temperature, and length needed to establish the law; and the discovery, proof, and strict validations of the laws, with both Reynolds and Prandtl number independency properties using DNS data. The establishment of these statistical laws is important to modern fluid mechanics and heat transfer research, and greatly expands our understanding of wall-bounded turbulence. - Provides an accurate mathematical definition of vortices - Provides a thorough survey of the latest research in generalized and flow-thermal, unified, law-of-the-wall for wall-bounded turbulence - Explains the term "Rortex as a mathematically defined rigid rotation of fluids or vortex - Covers the statistical laws important to modern fluid mechanics and heat transfer research, and greatly expands our understanding of wall-bounded turbulence
Author: Alfredo Soldati
Publisher: Springer
ISBN: 370912574X
Category : Technology & Engineering
Languages : en
Pages : 319
Get Book Here
Book Description
Controlling turbulence is an important issue for a number of technological applications. Several methods to modulate turbulence are currently being investigated. This book describes various aspects of turbulence structure and modulation, and explains and discusses the most promising techniques in detail.
Author:
Publisher: AIAA
ISBN: 9781600863783
Category : Boundary layer
Languages : en
Pages : 542
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 48
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 606
Get Book Here
Book Description
Author: Eduardo A Favret
Publisher: World Scientific
ISBN: 9814469246
Category : Science
Languages : en
Pages : 413
Get Book Here
Book Description
Many good books have been written recently on this new field called biomimetics or bionics, but few exploring simultaneously the characterization and technological processes to produce man-made surfaces with similar properties as the biological ones. Bio-inspired surface structures offer significant commercial potential for the creation of antireflective, self-cleaning and drag reducing surfaces, as well as new types of adhesive systems. This review volume explores how the current knowledge of the biological structures occurring on the surface of moth eyes, leaves, sharkskin, and the feet of reptiles can be transferred to functional technological materials. It analyses how such surfaces can be described and characterized using microscopic techniques and thus reproduced. It also encompasses the important areas of current surface replication techniques and the associated acquisition of good master structures.The book is divided in three sections: an introduction of the skin functions and four functional properties of biological surfaces; physical, chemical and microscopy techniques for describing and characterizing the surfaces; and replication techniques for modifying non-natural surfaces.
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 952
Get Book Here
Book Description
Author: G.E.A. Meier
Publisher: Springer
ISBN: 3709126886
Category : Technology & Engineering
Languages : en
Pages : 327
Get Book Here
Book Description
This volume contributes to one of the most important topics of Fluid Mechanics in future and presents recent research results on control theory and applied control methods. Understanding and handling of control methods of nonlinear systems, typical of Fluid Mechanics, is the key to reduce losses and to improve the efficiency and safety of technical processes.
