Author: Frederic RissoPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Direct Numerical Simulation of Trailing Vortices in Homogeneous Turbulence
Author: Frederic RissoDirect Numerical Simulation of Homogeneous Turbulence
Author: Publisher:
ISBN:
Category : Navier-Stokes equation
Languages : en
Pages : 14
Book Description
Theoretical Approaches to Turbulence
Author: D.L. DwoyerPublisher: Springer
ISBN:
Category : Mathematics
Languages : en
Pages : 400
Book Description
Turbulence is the lIDst natural nDde of fluid lIDtion, and has been the subject of scientific study for all!Dst a century. During this period, various ideas and techniques have evolved to nDdel turbulence. Following Saffman, these theoretical approaches can be broadly divided into four overlapping categories -- (1) analytical lIDdelling, (2) physical lIDdelling, (3) phenomenologicalllDdelling, and (4) nurerical lIDdelling. With the purpose of stmtnarizing our =ent understanding of these theoretical approaches to turbulence, recognized leaders (fluid dynamicists, mathematicians and physicists) in the field were invited to participate in a formal workshop during October 10-12, 1984, sponsored by The Institute for CooIputer Applications in Science and Engineering and NASA Langley Research Center. Kraiciman, McCcxnb, Pouquet and Spiegel represented the category of analytical nDdelling, while Landahl and Saffman represented physical lIDdelling. The contributions of Latmder and Spalding were in the category of phenanenological lIDdelling, and those of Ferziger and Reynolds in the area of nurericalllDdelling. Aref, Cholet, Lumley, Moin, Pope and Temam served on the panel discussions. With the care and cooperation of the participants, the workshop achieved its purpose, and we believe that its proceedings published in this vol\. llre has lasting scientific value. The tone of the workshop was set by two introductory talks by Bushnell and ChaImm. Buslmell presented the engineering viewpoint while Chapman reviewed from a historical perspective developments in the study of turbulence. The remaining talks dealt with specific aspects of the theoretical approaches to fluid turbulence.
The Dynamics of Vorticity and Rate-of-strain in Homogeneous Isotropic Turbulence
Author: Gary K. PostNumerical Experiments in Homogeneous Turbulence
Author: Robert Sugden RogalloPublisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 98
Book Description
Studying Turbulence Using Numerical Simulation Databases
Author: Center for Turbulence Research (U.S.)Publisher:
ISBN:
Category : Mathematical models
Languages : en
Pages : 346
Book Description
Direct numerical simulation of compressible homogeneous turbulence using natural initial conditions
Author: Vaibhav BhutoriaVorticity and Turbulence
Author: Alexandre J. ChorinPublisher: Springer Science & Business Media
ISBN: 1441987282
Category : Mathematics
Languages : en
Pages : 181
Book Description
This book provides an introduction to the theory of turbulence in fluids based on the representation of the flow by means of its vorticity field. It has long been understood that, at least in the case of incompressible flow, the vorticity representation is natural and physically transparent, yet the development of a theory of turbulence in this representation has been slow. The pioneering work of Onsager and of Joyce and Montgomery on the statistical mechanics of two-dimensional vortex systems has only recently been put on a firm mathematical footing, and the three-dimensional theory remains in parts speculative and even controversial. The first three chapters of the book contain a reasonably standard intro duction to homogeneous turbulence (the simplest case); a quick review of fluid mechanics is followed by a summary of the appropriate Fourier theory (more detailed than is customary in fluid mechanics) and by a summary of Kolmogorov's theory of the inertial range, slanted so as to dovetail with later vortex-based arguments. The possibility that the inertial spectrum is an equilibrium spectrum is raised.
Analysis of Weakly Compressible Turbulence Using Symmetry Methods and Direct Numerical Simulation
Author: Raphael Gotthard Harald ArlittPublisher: Cuvillier Verlag
ISBN: 3865373461
Category :
Languages : en
Pages : 221
Book Description
Turbulent Flows
Author: Jean PiquetPublisher: Springer Science & Business Media
ISBN: 9783540654117
Category : Technology & Engineering
Languages : en
Pages : 778
Book Description
obtained are still severely limited to low Reynolds numbers (about only one decade better than direct numerical simulations), and the interpretation of such calculations for complex, curved geometries is still unclear. It is evident that a lot of work (and a very significant increase in available computing power) is required before such methods can be adopted in daily's engineering practice. I hope to l"Cport on all these topics in a near future. The book is divided into six chapters, each· chapter in subchapters, sections and subsections. The first part is introduced by Chapter 1 which summarizes the equations of fluid mechanies, it is developed in C~apters 2 to 4 devoted to the construction of turbulence models. What has been called "engineering methods" is considered in Chapter 2 where the Reynolds averaged equations al"C established and the closure problem studied (§1-3). A first detailed study of homogeneous turbulent flows follows (§4). It includes a review of available experimental data and their modeling. The eddy viscosity concept is analyzed in §5 with the l"Csulting ~alar-transport equation models such as the famous K-e model. Reynolds stl"Css models (Chapter 4) require a preliminary consideration of two-point turbulence concepts which are developed in Chapter 3 devoted to homogeneous turbulence. We review the two-point moments of velocity fields and their spectral transforms (§ 1), their general dynamics (§2) with the particular case of homogeneous, isotropie turbulence (§3) whel"C the so-called Kolmogorov's assumptions are discussed at length.