Mesh Adaption Strategies For Vortex Dominated Flows
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Mesh Adaption Strategies For Vortex Dominated Flows
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Author : Sean Javad Kamkar
language : en
Publisher: Stanford University
Release Date : 2011
Mesh Adaption Strategies For Vortex Dominated Flows written by Sean Javad Kamkar and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A new adaptive mesh refinement strategy that is based on a coupled feature-detection and error-estimation approach is developed. The overall goal is to apply the proper degree of refinement to key vortical features in aircraft and rotorcraft wakes. The refinement paradigm is based on a two-stage process wherein the vortical regions are initially identified for refinement using feature-detection, and then the appropriate resolution is determined by the local solution error. The feature-detection scheme uses a local normalization procedure that allows it to automatically identify regions for refinement with threshold values that are not dependent upon the convective scales of the problem. An error estimator, based on the Richardson Extrapolation method, then supplies the identified features with appropriate levels of refinement. The estimator is shown to be well-behaved for steady-state and time-accurate aerodynamic flows. The above strategy is implemented within the Helios code, which features a dual-mesh paradigm of unstructured grids in the near-body domain, and adaptive Cartesian grids in the off-body domain. A main objective of this work is to control the adaption process so that high fidelity wake resolution is obtained in the off-body domain. The approach is tested on several theoretical and practical vortex-dominated flow-fields in an attempt to resolve wingtip vortices and rotor wakes. Accuracy improvements to rotorcraft performance metrics and increased wake resolution are simultaneously documented.
Mesh Adaption Strategies For Vortex Dominated Flows
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Author : Sean Javad Kamkar
language : en
Publisher:
Release Date : 2011
Mesh Adaption Strategies For Vortex Dominated Flows written by Sean Javad Kamkar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A new adaptive mesh refinement strategy that is based on a coupled feature-detection and error-estimation approach is developed. The overall goal is to apply the proper degree of refinement to key vortical features in aircraft and rotorcraft wakes. The refinement paradigm is based on a two-stage process wherein the vortical regions are initially identified for refinement using feature-detection, and then the appropriate resolution is determined by the local solution error. The feature-detection scheme uses a local normalization procedure that allows it to automatically identify regions for refinement with threshold values that are not dependent upon the convective scales of the problem. An error estimator, based on the Richardson Extrapolation method, then supplies the identified features with appropriate levels of refinement. The estimator is shown to be well-behaved for steady-state and time-accurate aerodynamic flows. The above strategy is implemented within the Helios code, which features a dual-mesh paradigm of unstructured grids in the near-body domain, and adaptive Cartesian grids in the off-body domain. A main objective of this work is to control the adaption process so that high fidelity wake resolution is obtained in the off-body domain. The approach is tested on several theoretical and practical vortex-dominated flow-fields in an attempt to resolve wingtip vortices and rotor wakes. Accuracy improvements to rotorcraft performance metrics and increased wake resolution are simultaneously documented.
Process Intensification
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Author : Mirko Skiborowski
language : en
Publisher: Walter de Gruyter GmbH & Co KG
Release Date : 2022-10-03
Process Intensification written by Mirko Skiborowski and has been published by Walter de Gruyter GmbH & Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-03 with Technology & Engineering categories.
Process intensification aims for increasing efficiency and sustainability of (bio-)chemical production processes. The second book of our two-book series focusses entirely on process intensifi cation by centrifugally enhanced (reactive) separations. The book provides an overview of the main applications of rotating packed beds (RPBs) in liquid-liquid, gas-liquid and vapor-liquid contacting, within academic research and industrial applications. The book addresses current design rules and modeling frameworks, including the tailored design of functional packings by means of additive manufacturing. Rotating packed beds are widely applicable and fl exible mass transfer machines for process intensifi cation. Applications, design rules and advanced modeling for rotating packed beds are presented in an interconnected way.
Icase Larc Workshop On Adaptive Grid Methods
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Author :
language : en
Publisher:
Release Date : 1995
Icase Larc Workshop On Adaptive Grid Methods written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Icase Larc Workshop On Adaptive Grid Methods
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Author : Jerry Curtis South
language : en
Publisher:
Release Date : 1995
Icase Larc Workshop On Adaptive Grid Methods written by Jerry Curtis South and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Fluid dynamics categories.
Computational Grids
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Author : Graham F. Carey
language : en
Publisher: CRC Press
Release Date : 1997-05-01
Computational Grids written by Graham F. Carey and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-05-01 with Mathematics categories.
In this comprehensive volume a treatment of grid generation, adaptive refinement, and redistribution techniques is developed together with supporting mathematical, algorithmic, and software concepts. Efficient solution strategies that exploit grid hierarchies are also described and analyzed. Emphasis is on the fundamental ideas, but the presentation includes practical guidelines for designing and implementing grid strategies.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Numerical Solutions Of The Euler Equations For Steady Flow Problems
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Author : Albrecht Eberle
language : en
Publisher: Vieweg+Teubner Verlag
Release Date : 2013-04-17
Numerical Solutions Of The Euler Equations For Steady Flow Problems written by Albrecht Eberle and has been published by Vieweg+Teubner Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Mathematics categories.
The last decade has seen a dramatic increase of our abilities to solve numerically the governing equations of fluid mechanics. In design aerodynamics the classical potential-flow methods have been complemented by higher modelling-level methods. Euler solvers, and for special purposes, already Navier-Stokes solvers are in use. The authors of this book have been working on the solution of the Euler equations for quite some time. While the first two of us have worked mainly on algorithmic problems, the third has been concerned off and on with modelling and application problems of Euler methods. When we started to write this book we decided to put our own work at the center of it. This was done because we thought, and we leave this to the reader to decide, that our work has attained over the years enough substance in order to justify a book. The problem which we soon faced, was that the field still is moving at a fast pace, for instance because hyper sonic computation problems became more and more important.
05 5131 05 5164
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Author :
language : en
Publisher:
Release Date : 2005
05 5131 05 5164 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Fluid dynamics categories.
Parallel Computational Fluid Dynamics 2001 Practice And Theory
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Author : P. Wilders
language : en
Publisher: Elsevier
Release Date : 2002-04-17
Parallel Computational Fluid Dynamics 2001 Practice And Theory written by P. Wilders and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-04-17 with Science categories.
ParCFD 2001, the thirteenth international conference on Parallel Computational Fluid Dynamics took place in Egmond aan Zee, the Netherlands, from May 21-23, 2001. The specialized, high-level ParCFD conferences are organized yearly on traveling locations all over the world. A strong back-up is given by the central organization located in the USA http://www.parcfd.org.These proceedings of ParCFD 2001 represent 70% of the oral lectures presented at the meeting. All published papers were subjected to a refereeing process, which resulted in a uniformly high quality.The papers cover not only the traditional areas of the ParCFD conferences, e.g. numerical schemes and algorithms, tools and environments, interdisciplinary topics, industrial applications, but, following local interests, also environmental and medical issues. These proceedings present an up-to-date overview of the state of the art in parallel computational fluid dynamics.