Modeling Of Flow Transition Using An Intermittency Transport Equation

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Modeling of Flow Transition Using an Intermittency Transport Equation

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Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720628866
Total Pages : 34 pages
Book Rating : 4.6/5 (288 download)

Book Synopsis Modeling of Flow Transition Using an Intermittency Transport Equation by : National Aeronautics and Space Administration (NASA)

Download or read book Modeling of Flow Transition Using an Intermittency Transport Equation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new transport equation for intermittency factor is proposed to model transitional flows. The intermittent behavior of the transitional flows is incorporated into the computations by modifying the eddy viscosity, mu(sub t), obtainable from a turbulence model, with the intermittency factor, gamma: mu(sub t, sup *) = gamma.mu(sub t). In this paper, Menter's SST model (Menter, 1994) is employed to compute mu(sub t) and other turbulent quantities. The proposed intermittency transport equation can be considered as a blending of two models - Steelant and Dick (1996) and Cho and Chung (1992). The former was proposed for near-wall flows and was designed to reproduce the streamwise variation of the intermittency factor in the transition zone following Dhawan and Narasimha correlation (Dhawan and Narasimha, 1958) and the latter was proposed for free shear flows and was used to provide a realistic cross-stream variation of the intermittency profile. The new model was used to predict the T3 series experiments assembled by Savill (1993a, 1993b) including flows with different freestream turbulence intensities and two pressure-gradient cases. For all test cases good agreements between the computed results and the experimental data are observed.Suzen, Y. B. and Huang, P. G.Glenn Research CenterINTERMITTENCY; TRANSPORT THEORY; EDDY VISCOSITY; TURBULENT FLOW; TURBULENCE MODELS; NAVIER-STOKES EQUATION; PRESSURE GRADIENTS; SHEAR FLOW; WALL FLOW; TRANSITION FLOW

Modeling of Flow Transition Using an Intermittency Transport Equation

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Author : Y. B. Suzen
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Modeling of Flow Transition Using an Intermittency Transport Equation by : Y. B. Suzen

Download or read book Modeling of Flow Transition Using an Intermittency Transport Equation written by Y. B. Suzen and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Intermittency Transport Equation for Modeling Flow TransitioneY. B. Suzen, P. G. Huang

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Author : Y. B. Suzen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

Book Synopsis An Intermittency Transport Equation for Modeling Flow TransitioneY. B. Suzen, P. G. Huang by : Y. B. Suzen

Download or read book An Intermittency Transport Equation for Modeling Flow TransitioneY. B. Suzen, P. G. Huang written by Y. B. Suzen and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Boundary Layer Flows

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Author : Vallampati Ramachandra Prasad
Publisher : BoD – Books on Demand
ISBN 13 : 1839681853
Total Pages : 236 pages
Book Rating : 4.8/5 (396 download)

Book Synopsis Boundary Layer Flows by : Vallampati Ramachandra Prasad

Download or read book Boundary Layer Flows written by Vallampati Ramachandra Prasad and published by BoD – Books on Demand. This book was released on 2020-01-22 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Transition Modeling for Low to High Speed Boundary Layer Flows with CFD Applications

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Author : √únver Kaynak
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

Book Synopsis Transition Modeling for Low to High Speed Boundary Layer Flows with CFD Applications by : √únver Kaynak

Download or read book Transition Modeling for Low to High Speed Boundary Layer Flows with CFD Applications written by √únver Kaynak and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition modeling as applied to CFD methods has followed certain line of evolution starting from simple linear stability methods to almost or fully predictive methods such as LES and DNS. One pragmatic approach among these methods, such as the local correlation-based transition modeling approach, is gaining more popularity due to its straightforward incorporation into RANS solvers. Such models are based on blending the laminar and turbulent regions of the flow field by introducing intermittency equations into the turbulence equations. Menter et al. pioneered this approach by their two-equation Œ≥-ReŒ∏ intermittency equation model that was incorporated into the k-œâ SST turbulence model that results in a total of four equations. Later, a range of various three-equation models was developed for super-/hypersonic flow applications. However, striking the idea that the ReŒ∏-equation was rather redundant, Menter produced a novel one-equation intermittency transport Œ≥-equation model. In this report, yet another recently introduced transition model called as the Bas-Cakmakcioglu (B-C) algebraic model is elaborated. In this model, an algebraic Œ≥-function, rather than the intermittency transport Œ≥-equation, is incorporated into the one-equation Spalart-Allmaras turbulence model. Using the present B-C model, a number of two-dimensional test cases and three-dimensional test cases were simulated with quite successful results.

Intermittency Equation for Transitional Flow

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Author : Ekachai Juntasaro
Publisher : Springer Nature
ISBN 13 : 3031039424
Total Pages : 91 pages
Book Rating : 4.0/5 (31 download)

Book Synopsis Intermittency Equation for Transitional Flow by : Ekachai Juntasaro

Download or read book Intermittency Equation for Transitional Flow written by Ekachai Juntasaro and published by Springer Nature. This book was released on 2022-05-16 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Advances in Transitional Flow Modeling

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Author : Chunhua Sheng
Publisher : Springer
ISBN 13 : 3319325760
Total Pages : 140 pages
Book Rating : 4.3/5 (193 download)

Book Synopsis Advances in Transitional Flow Modeling by : Chunhua Sheng

Download or read book Advances in Transitional Flow Modeling written by Chunhua Sheng and published by Springer. This book was released on 2016-11-26 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Modeling the Transition Region

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Author : Bart A. Singer
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Modeling the Transition Region by : Bart A. Singer

Download or read book Modeling the Transition Region written by Bart A. Singer and published by . This book was released on 1993 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Low Reynolds Number

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Author : Mustafa Serdar Genç
Publisher : BoD – Books on Demand
ISBN 13 : 9535104926
Total Pages : 176 pages
Book Rating : 4.5/5 (351 download)

Book Synopsis Low Reynolds Number by : Mustafa Serdar Genç

Download or read book Low Reynolds Number written by Mustafa Serdar Genç and published by BoD – Books on Demand. This book was released on 2012-04-04 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports the latest development and trends in the low Re number aerodynamics, transition from laminar to turbulence, unsteady low Reynolds number flows, experimental studies, numerical transition modelling, control of low Re number flows, and MAV wing aerodynamics. The contributors to each chapter are fluid mechanics and aerodynamics scientists and engineers with strong expertise in their respective fields. As a whole, the studies presented here reveal important new directions toward the realization of applications of MAV and wind turbine blades.

The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018)

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Author : Xinguo Zhang
Publisher : Springer
ISBN 13 : 981133305X
Total Pages : 3068 pages
Book Rating : 4.8/5 (113 download)

Book Synopsis The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018) by : Xinguo Zhang

Download or read book The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018) written by Xinguo Zhang and published by Springer. This book was released on 2019-06-08 with total page 3068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of peer-reviewed papers from the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018). The symposium is a common endeavour between the four national aerospace societies in China, Australia, Korea and Japan, namely, the Chinese Society of Aeronautics and Astronautics (CSAA), Royal Aeronautical Society Australian Division (RAeS Australian Division), the Korean Society for Aeronautical and Space Sciences (KSAS) and the Japan Society for Aeronautical and Space Sciences (JSASS). APISAT is an annual event initiated in 2009 to provide an opportunity for researchers and engineers from Asia-Pacific countries to discuss current and future advanced topics in aeronautical and space engineering.

Modelling Turbulence in Engineering and the Environment

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Author : Kemal Hanjalić
Publisher : Cambridge University Press
ISBN 13 : 0521845750
Total Pages : 403 pages
Book Rating : 4.5/5 (218 download)

Book Synopsis Modelling Turbulence in Engineering and the Environment by : Kemal Hanjalić

Download or read book Modelling Turbulence in Engineering and the Environment written by Kemal Hanjalić and published by Cambridge University Press. This book was released on 2011-10-20 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive account of advanced RANS turbulence models including numerous applications to complex flows in engineering and the environment.

Turbulence and Transition Modelling

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Author : M. Hallbäck
Publisher : Springer Science & Business Media
ISBN 13 : 9401586667
Total Pages : 379 pages
Book Rating : 4.4/5 (15 download)

Book Synopsis Turbulence and Transition Modelling by : M. Hallbäck

Download or read book Turbulence and Transition Modelling written by M. Hallbäck and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to give, within a single volume, an introduction to the fields of turbulence modelling and transition-to-turbulence prediction, and to provide the physical background for today's modelling approaches in these problem areas as well as giving a flavour of advanced use of prediction methods. Turbulence modelling approaches, ranging from single-point models based on the eddy-viscosity concept and the Reynolds stress transport equations (Chapters 3,4,5), to large-eddy simulation (LES) techniques (Ch. 7), are covered. The foundations of hydrodynamical stability and transition are presented (Ch. 2) along with transition prediction methods based on single-point closures (Ch. 6), LES techniques (Ch. 7) and the parabolized stability equations (Ch. 8). The book addresses engineers and researchers, in industry or academia, who are entering into the fields of turbulence or transition modelling research or need to apply turbulence or transition prediction methods in their work.

All Fluid-flow-regimes Simulation Model for Internal Flows

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Author : John P. Abraham
Publisher : Nova Novinka
ISBN 13 : 9781611225037
Total Pages : 0 pages
Book Rating : 4.2/5 (25 download)

Book Synopsis All Fluid-flow-regimes Simulation Model for Internal Flows by : John P. Abraham

Download or read book All Fluid-flow-regimes Simulation Model for Internal Flows written by John P. Abraham and published by Nova Novinka. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

An Introduction to Flapping Wing Aerodynamics

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Author : Wei Shyy
Publisher : Cambridge University Press
ISBN 13 : 1107067987
Total Pages : 321 pages
Book Rating : 4.1/5 (7 download)

Book Synopsis An Introduction to Flapping Wing Aerodynamics by : Wei Shyy

Download or read book An Introduction to Flapping Wing Aerodynamics written by Wei Shyy and published by Cambridge University Press. This book was released on 2013-08-19 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an ideal book for graduate students and researchers interested in the aerodynamics, structural dynamics and flight dynamics of small birds, bats and insects, as well as of micro air vehicles (MAVs), which present some of the richest problems intersecting science and engineering. The agility and spectacular flight performance of natural flyers, thanks to their flexible, deformable wing structures, as well as to outstanding wing, tail and body coordination, is particularly significant. To design and build MAVs with performance comparable to natural flyers, it is essential that natural flyers' combined flexible structural dynamics and aerodynamics are adequately understood. The primary focus of this book is to address the recent developments in flapping wing aerodynamics. This book extends the work presented in Aerodynamics of Low Reynolds Number Flyers (Shyy et al. 2008).

Statistical Theory and Modeling for Turbulent Flows

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Author : P. A. Durbin
Publisher : Wiley-Blackwell
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis Statistical Theory and Modeling for Turbulent Flows by : P. A. Durbin

Download or read book Statistical Theory and Modeling for Turbulent Flows written by P. A. Durbin and published by Wiley-Blackwell. This book was released on 2001-03-12 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most natural and industrial flows are turbulent. The atmosphere and oceans, automobile and aircraft engines, all provide examples of this ubiquitous phenomenon. In recent years, turbulence has become a very lively area of scientific research and application, and this work offers a grounding in the subject of turbulence, developing both the physical insight and the mathematical framework needed to express the theory. Providing a solid foundation in the key topics in turbulence, this valuable reference resource enables the reader to become a knowledgeable developer of predictive tools. This central and broad ranging topic would be of interest to graduate students in a broad range of subjects, including aeronautical and mechanical engineering, applied mathematics and the physical sciences. The accompanying solutions manual to the text also makes this a valuable teaching tool for lecturers and for practising engineers and scientists in computational and experimental and experimental fluid dynamics.

Aeronautics and Astronautics

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Author : Sergio De Rosa
Publisher : Materials Research Forum LLC
ISBN 13 : 164490280X
Total Pages : 805 pages
Book Rating : 4.6/5 (449 download)

Book Synopsis Aeronautics and Astronautics by : Sergio De Rosa

Download or read book Aeronautics and Astronautics written by Sergio De Rosa and published by Materials Research Forum LLC. This book was released on 2023-12-15 with total page 805 pages. Available in PDF, EPUB and Kindle. Book excerpt: These conference proceedings present 165 papers in all scientific and aerospace engineering fields, including materials and structures, aerodynamics and fluid dynamics, propulsion, aerospace systems, flight mechanics and control, space systems, and missions. Keywords: Aerospace Shell Structures, MCAST's Aerospace Program, Sandwich Structures, Thermal Buckling, Simulation of Elastodynamic Problems. Statically Deflected Beam, Meshes with Arbitrary Polygons, Variable Stiffness Composite Panels, Mechanical Response of Composites, 3D Printing Technique, Hygrothermal Effects in Composite Materials, Freeze-Thaw Cycling, Polymer Matrices, Morphing Aileron, Thermo-Elastic Homogenization of Polycrystals, Flutter Instability in Elastic Structures, Adaptive Composite Wings, Cylindrical IGA Patches, TRAC Longerons, Structural Damage Detection, Fatigue Behavior of Stiffened Composite Components, Redesign of Composite Fuselage Barrel Components, Damage Modelling of Metallic Lattice Materials, Ceramic Matrix Composites, Peridynamics Elastoplastic Model, Structural Batteries Challenges. Dynamic Buckling Structural Test, Delamination Identification on Composites Panels. CubeSat Radiative Surface, Wind Tunnel Testing.

AIAA Aerospace Sciences Meeting and Exhibit, 42nd

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Author :
Publisher :
ISBN 13 :
Total Pages : 596 pages
Book Rating : 4.0/5 ( download)

Book Synopsis AIAA Aerospace Sciences Meeting and Exhibit, 42nd by :

Download or read book AIAA Aerospace Sciences Meeting and Exhibit, 42nd written by and published by . This book was released on 2004 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: