Download or read book Numerical Algorithm for the Computation of Compressible Turbulent Flows at Arbitrary Mach Number Regimes written by Kian Chuan Ong and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Parallel Finite Volume Algorithm for Large eddy Simulation of Turbulent Flows written by Trong T. Bui and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Turbulent Flow Computations written by Roger Peyret and published by Springer. This book was released on 2014-05-04 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects the lecture notes concerning the IUTAM School on Advanced Turbulent Flow Computations held at CISM in Udine September 7–11, 1998. The course was intended for scientists, engineers and post-graduate students interested in the application of advanced numerical techniques for simulating turbulent flows. The topic comprises two closely connected main subjects: modelling and computation, mesh pionts necessary to simulate complex turbulent flow.
Download or read book Numerical Methods in Laminar and Turbulent Flow written by and published by . This book was released on 1997 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Methods for Turbulent Transonic and Viscous Flows written by Jean-André Essers and published by . This book was released on 1983 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Novel Algorithm for DNS LES of Compressible Turbulent Flows written by Yucheng Hou and published by . This book was released on 2007 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computation and Comparison of Efficient Turbulence Models for Aeronautics European Research Project ETMA written by Alain Dervieux and published by Springer Science & Business Media. This book was released on 1998-08-27 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains contributions to the BRITE-EURAM 3rd Framework Programme ETMA and extended articles of the TMA-Workshop. It focusses on turbulence modelling techniques suitable to use in typical flow configurations, with emphasis on compressibility effects and inherent unsteadiness. These methodologies are applied to the Navier-Stokes equations, involving various turbulence modelling levels from algebraic to RSM. Basic turbulent flows in aeronautics are considered; mixing layers, wall-flows (flat-plate, backward-facing step, ramp, bump), and more complex configurations (bump, aerofoil). A critical assessment of the turbulence modelling performances is offered, based on previous results and on the experimental data-base of this research programme. The ETMA results figure in the data-base constituted by all partners and organized by INRIA
Download or read book Compressibility Turbulence and High Speed Flow written by Thomas B. Gatski and published by Academic Press. This book was released on 2013-03-05 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compressibility, Turbulence and High Speed Flow introduces the reader to the field of compressible turbulence and compressible turbulent flows across a broad speed range, through a unique complimentary treatment of both the theoretical foundations and the measurement and analysis tools currently used. The book provides the reader with the necessary background and current trends in the theoretical and experimental aspects of compressible turbulent flows and compressible turbulence. Detailed derivations of the pertinent equations describing the motion of such turbulent flows is provided and an extensive discussion of the various approaches used in predicting both free shear and wall bounded flows is presented. Experimental measurement techniques common to the compressible flow regime are introduced with particular emphasis on the unique challenges presented by high speed flows. Both experimental and numerical simulation work is supplied throughout to provide the reader with an overall perspective of current trends. An introduction to current techniques in compressible turbulent flow analysis An approach that enables engineers to identify and solve complex compressible flow challenges Prediction methodologies, including the Reynolds-averaged Navier Stokes (RANS) method, scale filtered methods and direct numerical simulation (DNS) Current strategies focusing on compressible flow control
Download or read book Direct Numerical Simulation of Compressible Turbulent Flows Using Adaptive Spectral Element Method written by T. J. Chung and published by . This book was released on 1994 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Investigation of Separated Transonic Turbulent Flows with a Multiple time scale Turbulence Model written by S. W. Kim and published by . This book was released on 1990 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Fluid Dynamics written by Jiri Blazek and published by Butterworth-Heinemann. This book was released on 2015-04-23 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational Fluid Dynamics: Principles and Applications, Third Edition presents students, engineers, and scientists with all they need to gain a solid understanding of the numerical methods and principles underlying modern computation techniques in fluid dynamics. By providing complete coverage of the essential knowledge required in order to write codes or understand commercial codes, the book gives the reader an overview of fundamentals and solution strategies in the early chapters before moving on to cover the details of different solution techniques. This updated edition includes new worked programming examples, expanded coverage and recent literature regarding incompressible flows, the Discontinuous Galerkin Method, the Lattice Boltzmann Method, higher-order spatial schemes, implicit Runge-Kutta methods and parallelization. An accompanying companion website contains the sources of 1-D and 2-D Euler and Navier-Stokes flow solvers (structured and unstructured) and grid generators, along with tools for Von Neumann stability analysis of 1-D model equations and examples of various parallelization techniques. Will provide you with the knowledge required to develop and understand modern flow simulation codes Features new worked programming examples and expanded coverage of incompressible flows, implicit Runge-Kutta methods and code parallelization, among other topics Includes accompanying companion website that contains the sources of 1-D and 2-D flow solvers as well as grid generators and examples of parallelization techniques
Download or read book The Analysis and Simulation of Compressible Turbulence written by Institute for Computer Applications in Science and Engineering and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non Body Conformal Grid Methods for Large Eddy Simulations of Compressible Flows and Their Applications in Computational Aeroacoustics written by Jee-Whan Nam and published by . This book was released on 2015 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the applications of computational aeroacoustics (CAA) involving far-field noise predictions, the most common solution strategy is the \textit{hybrid method} which combines a computational fluid dynamics (CFD) solver for the sound source field with an acoustic solver for the acoustic far-field. Hybrid CAA methods provide flexibility to select the most appropriate methods to compute the sound source and the acoustic fields, respectively, to suit various aeroacoustic problems. The present study reports the development of a hybrid large-eddy simulation (LES)-acoustic analogy method to effectively predict the noise of viscous flow over complex geometries. With complex geometries, difficulties arise with numerical methods based on body fitted grids. Generating good quality body fitted grids around complex geometries is challenging and time-consuming. Alternatively, numerical methods based on non-body conformal grids can deal with bodies of almost any arbitrary shape. Although the present research was initially motivated for CAA applications, most of the contributions and the novelty of the work is in the development of efficient, easy-to-implement and more accurate non-body conformal methods that can be used for flow over complex geometries. To date, most of the listed work on non-body conformal methods is applied to incompressible flows. The use of non-body conformal methods for compressible turbulent flows is still rare and immature. Two non-body conformal grid methods are developed and assessed in this work: the ghost-cell based immersed boundary method (GC-IBM) and the ghost-cell based cut-cell method (GC-CCM). In both methods, the boundary conditions on the immersed boundary are enforced through the use of ``ghost cells'' located inside the solid body. Variables on these ghost cells are computed using linear interpolation schemes. The implementation using GC-IBM is simpler; however, the exact shape of the fluid cells in the vicinity of the solid boundary is not detailed, which results in the loss or gain of mass and momentum. As such, sufficiently refined meshing is required in the vicinity of the solid boundary to mitigate the error on mass conservation. The implementation using GC-CCM requires more work; however, the underlying conservation laws is guaranteed by introducing ``cut cells''. A cell-merging approach is used to address the \textit{small-cell problem} associated with a Cartesian cut-cell method, which, if untreated, results in the numerical instability and stiffness of the system of equations. The applicability of the developed non-body conformal methods is investigated in the compressible LES framework. Turbulent flows in various complex geometric settings are simulated using these non-body conformal methods for a wide range of Reynolds numbers and Mach numbers. For high Reynolds number flows, the developed non-body conformal methods employ a wall model to approximate the wall-shear stress, thus avoiding a requirement for severe grid resolution near the wall. No previously published work involves LES of high Reynolds number compressible flows using a wall model and a non-body conformal method. This research uses a simple wall model based on a wall function to approximate the near wall behaviour, but this approach can be extended to other wall models if necessary. Better wall modelling strategies should be investigated in the future. The numerical results demonstrate that the GC-CCM is capable of capturing near-wall flows relatively well despite the simple wall model used. GC-CCM also provides relatively accurate results compared to other non-body conformal methods. Returning to the original research efforts for aeroacoustic applications, the GC-CCM is finally benchmarked for the prediction of far-field radiated noise from a flow over a circular cylinder. Of many hybrid approaches available in CAA, Ffowcs-Williams and Hawkings (FW-H) approach is selected to explore the far-field acoustic calculation. Comparison of the results to the experimental data shows that the developed hybrid LES-acoustic analogy method is capable of accurately predicting the sound spectrum for this case of three-dimensional flow over a cylinder in the sub-critical regime. Large-eddy simulations with more complex geometries, such as wings or high-lift systems, have not been performed as a part of this research. Further work is encouraged in order to conclude the research direction originally envisioned by the author.
Download or read book Computation of Turbulent Flows Over Backward facing Step written by and published by . This book was released on 1983 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Riemann Solvers and Numerical Methods for Fluid Dynamics written by Eleuterio F. Toro and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: High resolution upwind and centered methods are today a mature generation of computational techniques applicable to a wide range of engineering and scientific disciplines, Computational Fluid Dynamics (CFD) being the most prominent up to now. This textbook gives a comprehensive, coherent and practical presentation of this class of techniques. The book is designed to provide readers with an understanding of the basic concepts, some of the underlying theory, the ability to critically use the current research papers on the subject, and, above all, with the required information for the practical implementation of the methods. Applications include: compressible, steady, unsteady, reactive, viscous, non-viscous and free surface flows.
Download or read book Numerical Simulation of Turbulent Flows and Noise Generation written by Christophe Brun and published by Springer Science & Business Media. This book was released on 2009-03-07 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large Eddy Simulation (LES) is a high-fidelity approach to the numerical simulation of turbulent flows. Recent developments have shown LES to be able to predict aerodynamic noise generation and propagation as well as the turbulent flow, by means of either a hybrid or a direct approach. This book is based on the results of two French/German research groups working on LES simulations in complex geometries and noise generation in turbulent flows. The results provide insights into modern prediction approaches for turbulent flows and noise generation mechanisms as well as their use for novel noise reduction concepts.
Download or read book Turbulent Flow Computation written by D. Drikakis and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: In various branches of fluid mechanics, our understanding is inhibited by the presence of turbulence. Although many experimental and theoretical studies have significantly helped to increase our physical understanding, a comp- hensive and predictive theory of turbulent flows has not yet been established. Therefore, the prediction of turbulent flow relies heavily on simulation stra- gies. The development of reliable methods for turbulent flow computation will have a significant impact on a variety of technological advancements. These range from aircraft and car design, to turbomachinery, combustors, and process engineering. Moreover, simulation approaches are important in materials - sign, prediction of biologically relevant flows, and also significantly contribute to the understanding of environmental processes including weather and climate forecasting. The material that is compiled in this book presents a coherent account of contemporary computational approaches for turbulent flows. It aims to p- vide the reader with information about the current state of the art as well as to stimulate directions for future research and development. The book puts part- ular emphasis on computational methods for incompressible and compressible turbulent flows as well as on methods for analysing and quantifying nume- cal errors in turbulent flow computations. In addition, it presents turbulence modelling approaches in the context of large eddy simulation, and unfolds the challenges in the field of simulations for multiphase flows and computational fluid dynamics (CFD) of engineering flows in complex geometries. Apart from reviewing main research developments, new material is also included in many of the chapters.
