Intermittency Equation for Transitional Flow

Intermittency Equation for Transitional Flow

Author: Ekachai Juntasaro

Publisher: Springer Nature

Published: 2022-05-16

Total Pages: 91

ISBN-13: 3031039424

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This book provides the intermittency equation that is derived a priori. Since the intermittency equation is mathematically obtained, the resulting gamma transition model no longer requires any extra parameters and terms to explicitly account for free-stream turbulence and pressure gradient like the previous transition models. Instead, the present gamma transition model can naturally predict natural transition and effects of free-stream turbulence and pressure gradient on the transition process. Furthermore, the present gamma transition model requires much fewer model constants than the previous transition models. The book is beneficial for CFD researchers in industry and academia who confront modern complex applications involving simultaneously laminar, transitional and turbulent flow regimes, and ideally relevant to graduate students in applied physics, applied mathematics and engineering who are interested in the world of laminar-to-turbulent transition modeling in CFD, or would like to further advance more realistic transition models in the future.


Intermittency Equation for Transitional Flow

Intermittency Equation for Transitional Flow

Author: Ekachai Juntasaro

Publisher:

Published: 2022

Total Pages: 0

ISBN-13: 9783031039430

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This book provides the intermittency equation that is derived a priori. Since the intermittency equation is mathematically obtained, the resulting gamma transition model no longer requires any extra parameters and terms to explicitly account for free-stream turbulence and pressure gradient like the previous transition models. Instead, the present gamma transition model can naturally predict natural transition and effects of free-stream turbulence and pressure gradient on the transition process. Furthermore, the present gamma transition model requires much fewer model constants than the previous transition models. The book is beneficial for CFD researchers in industry and academia who confront modern complex applications involving simultaneously laminar, transitional and turbulent flow regimes, and ideally relevant to graduate students in applied physics, applied mathematics and engineering who are interested in the world of laminar-to-turbulent transition modeling in CFD, or would like to further advance more realistic transition models in the future.


Boundary Layer Flows

Boundary Layer Flows

Author: Vallampati Ramachandra Prasad

Publisher: BoD – Books on Demand

Published: 2020-01-22

Total Pages: 236

ISBN-13: 1839681853

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Written by experts in the field, this book, "Boundary Layer Flows - Theory, Applications, and Numerical Methods" provides readers with the opportunity to explore its theoretical and experimental studies and their importance to the nonlinear theory of boundary layer flows, the theory of heat and mass transfer, and the dynamics of fluid. With the theory's importance for a wide variety of applications, applied mathematicians, scientists, and engineers - especially those in fluid dynamics - along with engineers of aeronautics, will undoubtedly welcome this authoritative, up-to-date book.


Intermittency in Transitional Shear Flows

Intermittency in Transitional Shear Flows

Author: Yohann Duguet

Publisher: MDPI

Published: 2021-08-31

Total Pages: 180

ISBN-13: 3036509429

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This book contains original peer-reviewed articles written by some of the most prominent international physicists active in the field of hydrodynamics. The topic is entirely devoted to the study of the transitional regimes of incompressible viscous flow found at the onset of turbulent flows. Nine articles written for this 2020 Special Issue of the journal Entropy (MDPI) have been gathered at the crossroads of fluid mechanics, statistical physics, complexity theory, and applied mathematics. They include experimental, analytic, and computational material of an academic level that has not been published anywhere else.


Intermittency in Turbulent Flows

Intermittency in Turbulent Flows

Author: J. C. Vassilicos

Publisher: Cambridge University Press

Published: 2001

Total Pages: 292

ISBN-13: 9780521792219

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This volume was the product of a workshop held at the Newton Institute in Cambridge, and examines turbulence, intermittency, nonlinear dynamics and fluid mechanics.


All Fluid-flow-regimes Simulation Model for Internal Flows

All Fluid-flow-regimes Simulation Model for Internal Flows

Author: John P. Abraham

Publisher: Nova Novinka

Published: 2011

Total Pages: 0

ISBN-13: 9781611225037

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A multi-regime fluid flow model for internal flows has been applied to several pipe and duct problems. The investigated flow regimes and inter-regime transformations include fully laminar and fully turbulent, laminarisation, and turbulentisation. The model auto-selects both the flow regimes and the inter-regime transformations. This book studies both steady and unsteady flows, as well as flows in pipes and ducts of both axially unchanging cross section and axially enlarging cross section.


Elements of Transitional Boundary-Layer Flowlements

Elements of Transitional Boundary-Layer Flowlements

Author: Robert Edward Mayle

Publisher: Logos Verlag Berlin GmbH

Published: 2018

Total Pages: 418

ISBN-13: 3832545980

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Second Enhanced Edition Suitable for advanced-level courses or an independent study in fluid mechanics, this text by an expert in the field provides the basic aspects of laminar-to-turbulent flow transition in boundary layers. Logically organized into three major parts, the book covers pre- and post-transitional flow, transitional flow, and several advanced topics in periodically disturbed transitional flow. Some of the subjects covered within the book include high-frequency unsteady laminar flow, turbulent flow, natural transition, bypass transition, turbulent spot theory, turbulent spot kinematics and production, correlations for the onset and rate of transition, global and conditional averaging, transitional flow models, wakeinduced transition, multimode transition, and separated-flow transition. Containing some 202 figures (all drawn by the author), 28 tables, 12 appendices, a supplement on tensors, and an extensive bibliography, the 415 page book provides a wealth of data and information about the subject.


Advances in Transitional Flow Modeling

Advances in Transitional Flow Modeling

Author: Chunhua Sheng

Publisher: Springer

Published: 2016-11-26

Total Pages: 140

ISBN-13: 3319325760

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This book provides a comprehensive description of numerical methods and validation processes for predicting transitional flows based on the Langtry–Menter local correlation-based transition model, integrated with both one-equation Spalart–Allmaras (S–A) and two-equation Shear Stress Transport (SST) turbulence models. A comparative study is presented to combine the respective merits of the two coupling methods in the context of predicting the boundary-layer transition phenomenon from fundamental benchmark flows to realistic helicopter rotors. The book will of interest to industrial practitioners working in aerodynamic design and the analysis of fixed-wing or rotary wing aircraft, while also offering advanced reading material for graduate students in the research areas of Computational Fluid Dynamics (CFD), turbulence modeling and related fields.