Download or read book On the Discrete Core of Quadrilateral Mesh Refinement written by Matthias Müller-Hannemann and published by . This book was released on 1998 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Algorithm Engineering written by Stefan Näher and published by Springer Science & Business Media. This book was released on 2007-06-03 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers accepted for the 4th Workshop on Algorithm Engineering (WAE 2000) held in Saarbruc ̈ ken, Germany, during 5–8 September 2000, together with the abstract of the invited lecture given by Karsten Weihe. The Workshop on Algorithm Engineering covers research on all aspects of the subject. The goal is to present recent research results and to identify and explore directions for future research. Previous meetings were held in Venice (1997), Saarbruc ̈ ken (1998), and London (1999). Papers were solicited describing original research in all aspects of algorithm engineering, including: – Development of software repositories and platforms which allow the use of and experimentation with e?cient discrete algorithms. – Novel uses of discrete algorithms in other disciplines and the evaluation of algorithms for realistic environments. – Methodological issues including standards in the context of empirical - search on algorithms and data structures. – Methodological issues regarding the process of converting user requirements into e?cient algorithmic solutions and implementations. The program committee accepted 16 from a total of 30 submissions. The program committee meeting was conducted electronically. The criteria for sel- tion were originality, quality, and relevance to the subject area of the workshop. Considerable e?ort was devoted to the evaluation of the submissions and to p- viding the authors with feedback. Each submission was reviewed by at least four program committee members (assisted by subreferees). A special issue of the ACM Journal of Experimental Algorithmics will be devoted to selected papers from WAE 2000.
Download or read book Automated All quadrilateral Mesh Adaptation Through Refinement and Coarsening written by Bret Dallas Anderson and published by . This book was released on 2009 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a new approach to conformal all-quadrilateral mesh adaptation. In finite element modeling applications, it is often desirable to modify the node density of the mesh; increasing the density in some parts of the mesh to provide more accurate results, while decreasing the density in other parts to reduce computation time. The desired node density is typically determined by a sizing function based on either the geometry of the model or the results of a finite element solution. Although there are numerous mesh adaptation methods currently in use, including initial adaptive mesh generation, node redistribution, and adaptive mesh refinement, there are relatively few methods that modify the mesh density by adding and removing mesh elements, and none of these guarantee a conformal, all-quadrilateral mesh while allowing general coarsening. This work introduces a new method that incorporates both conformal refinement and coarsening strategies on an existing mesh of any density or configuration. Given a sizing function, this method modifies the mesh by combining existing template based quadrilateral refinement methods with recent developments in localized quadrilateral coarsening and quality improvement into an automated mesh adaptation routine.
Download or read book Adaptive Mesh Refinement Theory and Applications written by Tomasz Plewa and published by Springer Science & Business Media. This book was released on 2005-12-20 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced numerical simulations that use adaptive mesh refinement (AMR) methods have now become routine in engineering and science. Originally developed for computational fluid dynamics applications these methods have propagated to fields as diverse as astrophysics, climate modeling, combustion, biophysics and many others. The underlying physical models and equations used in these disciplines are rather different, yet algorithmic and implementation issues facing practitioners are often remarkably similar. Unfortunately, there has been little effort to review the advances and outstanding issues of adaptive mesh refinement methods across such a variety of fields. This book attempts to bridge this gap. The book presents a collection of papers by experts in the field of AMR who analyze past advances in the field and evaluate the current state of adaptive mesh refinement methods in scientific computing.
Download or read book Algorithm Engineering written by and published by . This book was released on 2001 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conformal Refinement of Unstructured Quadrilateral Meshes written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a multilevel adaptive refinement technique for unstructured quadrilateral meshes in which the mesh is kept conformal at all times. This means that the refined mesh, like the original, is formed of only quadrilateral elements that intersect strictly along edges or at vertices, i.e., vertices of one quadrilateral element do not lie in an edge of another quadrilateral. Elements are refined using templates based on 1:3 refinement of edges. We demonstrate that by careful design of the refinement and coarsening strategy, we can maintain high quality elements in the refined mesh. We demonstrate the method on a number of examples with dynamically changing refinement regions.
Download or read book Introduction to Numerical Geodynamic Modelling written by Taras Gerya and published by Cambridge University Press. This book was released on 2010 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: This user-friendly reference for students and researchers presents the basic mathematical theory, before introducing modelling of key geodynamic processes.
Download or read book Large Scale Computing Techniques for Complex System Simulations written by Werner Dubitzky and published by John Wiley & Sons. This book was released on 2012-02-03 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex systems modeling and simulation approaches are being adopted in a growing number of sectors, including finance, economics, biology, astronomy, and many more. Technologies ranging from distributed computing to specialized hardware are explored and developed to address the computational requirements arising in complex systems simulations. The aim of this book is to present a representative overview of contemporary large-scale computing technologies in the context of complex systems simulations applications. The intention is to identify new research directions in this field and to provide a communications platform facilitating an exchange of concepts, ideas and needs between the scientists and technologist and complex system modelers. On the application side, the book focuses on modeling and simulation of natural and man-made complex systems. On the computing technology side, emphasis is placed on the distributed computing approaches, but supercomputing and other novel technologies are also considered.
Download or read book An Adaptive Mesh Refinement Algorithm for the Discrete Ordinates Method written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Delaunay Mesh Generation written by Siu-Wing Cheng and published by CRC Press. This book was released on 2016-04-19 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by authors at the forefront of modern algorithms research, Delaunay Mesh Generation demonstrates the power and versatility of Delaunay meshers in tackling complex geometric domains ranging from polyhedra with internal boundaries to piecewise smooth surfaces. Covering both volume and surface meshes, the authors fully explain how and why thes
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Two dimensional Finite Element Mesh Generator with Automatic Mesh Refinement Using Quadrilateral Elements and Bezier Curve Boundary Definition written by Jeffrey A. Talbert and published by . This book was released on 1987 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Singularity Quadrilateral Meshes for Numerical Simulations written by Chaman Singh Verma and published by . This book was released on 2017 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Triangle and quadrilateral meshes are two common ways discretize 2D domains, and 3D surfaces. Despite many inherent theoretical advantages of quadrilateral meshes, triangular meshes are more widely used for the following reasons: (1) there are many well-known triangle mesh generating algorithms that are fast, parameters-free, and robust, and (2) triangular meshes are easy to modify and optimize. The main contributions of this thesis are new theoretical results, and associated algorithms that demonstrate that one can rapidly generate high quality quadrilateral meshes, and modify them as easily. Specifically, the thesis describes the following four concepts specifically related to quadrilateral meshes. ·Perfect-Matching Triangulation to Quadrangulation Conversion: Converting a triangle mesh to a quadrilateral mesh, with perfect matching (i.e., with no dangling triangles), is of significant interest. Current perfect-matching algorithms are variations of Edmond's classic Blossom algorithm. One variation is the tree-percolation algorithm that utilizes the binary tree dual of a triangular mesh. This algorithm is extremely fast, but does not guarantee perfect matching. In this thesis, I show how the tree-percolation algorithm can be modified to result in perfect matching, without sacrificing on speed. To the best of my knowledge, the proposed tree percolation with flipping (TPF) is the fastest algorithm today to convert a triangular mesh into a quadrilateral mesh with perfect matching. As with any perfect matching algorithm, the topological quality of the quadrilateral mesh is often very poor, and the resulting quadrilateral mesh cannot be used for simulation. However, it is often used as an initial quadrilateral mesh for further improvement. ·Minimum Singularity Templates: Improving a quadrilateral mesh means improving both the geometric and topological qualities. Local improvements of a quadrilateral mesh are almost impossible since modifying a single element can have a global effect on the mesh (unlike in triangular meshes). While several non-local methods have been proposed, most of these focus on geometric quality, and often sacrifice on topological quality. This thesis introduces the concept of minimum singularity templates (MST) that address both qualities simultaneously. The MST aims to reduce the number of singularities in an existing quadrilateral mesh in a systematic manner, while maintaining geometric quality. ·Unified Quad Mesh Adaptation Technique: Mesh adaptation refers to the task of refining, coarsening or improving a mesh. It plays a critical role in balancing computational efficiency and numerical accuracy in various applications. Currently, different methods have been proposed for each of these three adaptations, and they all invariably reduce the topological quality of the mesh. In this thesis, a unified concept of "alpha" MST template is introduced, where a single parameter "alpha" is used to achieve all three forms of adaptations. With "alpha = 1", we would improve the quality of the mesh, with "alpha 1" we would simplify the mesh, and "alpha 1" would refine the mesh. Furthermore, the proposed unified algorithm will not deteriorate the topological quality. ·An Ab-initio Quad Mesh Generator: Exploiting the concept of MST, the thesis describes a new indirect method for ab-initio generating quadrilateral meshes. The proposed combinatorial quadrilateral mesh generation (CQMG) algorithm is robust and fast (capable of generating millions of elements per second. The underlying reason is that CQMG uses simple algebraic checks, instead of expensive exact geometric predicates. The speed and robustness are demonstrated through numerous examples, and compared against other popular algorithms.
Download or read book Developments in the Analysis and Design of Marine Structures written by Jorgen Amdahl and published by CRC Press. This book was released on 2021-12-17 with total page 1274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in the Analysis and Design of Marine Structures is a collection of papers presented at MARSTRUCT 2021, the 8th International Conference on Marine Structures (by remote transmission, 7-9 June 2021, organised by the Department of Marine Technology of the Norwegian University of Science and Technology, Trondheim, Norway), and is essential reading for academics, engineers and professionals involved in the design of marine and offshore structures. The MARSTRUCT Conference series deals with Ship and Offshore Structures, addressing topics in the fields of: - Methods and Tools for Loads and Load Effects; - Methods and Tools for Strength Assessment; - Experimental Analysis of Structures; - Materials and Fabrication of Structures; - Methods and Tools for Structural Design and Optimisation; and - Structural Reliability, Safety and Environmental Protection. The MARSTRUCT conferences series of started in Glasgow, UK in 2007, the second event of the series took place in Lisbon, Portugal in March 2009, the third in Hamburg, Germany in March 2011, the fourth in Espoo, Finland in March 2013, the fifth in Southampton, UK in March 2015, the sixth in Lisbon, Portugal in May 2017, and the seventh in Drubovnik, Croatia in May 2019. The ‘Proceedings in Marine Technology and Ocean Engineering’ series is dedicated to the publication of proceedings of peer-reviewed international conferences dealing with various aspects of ‘Marine Technology and Ocean Engineering’. The Series includes the proceedings of the following conferences: the International Maritime Association of the Mediterranean (IMAM) conferences, the Marine Structures (MARSTRUCT) conferences, the Renewable Energies Offshore (RENEW) conferences and the Maritime Technology (MARTECH) conferences. The ‘Marine Technology and Ocean Engineering’ series is also open to new conferences that cover topics on the sustainable exploration and exploitation of marine resources in various fields, such as maritime transport and ports, usage of the ocean including coastal areas, nautical activities, the exploration and exploitation of mineral resources, the protection of the marine environment and its resources, and risk analysis, safety and reliability. The aim of the series is to stimulate advanced education and training through the wide dissemination of the results of scientific research.
Download or read book Adaptive Atmospheric Modeling written by Jörn Behrens and published by Springer Science & Business Media. This book was released on 2007-06-25 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an overview of the development of adaptive techniques for atmospheric modeling. Written in an educational style, it functions as a starting point for readers interested in adaptive modeling, in atmospheric sciences and beyond. Coverage includes paradigms of adaptive techniques, such as error estimation and adaptation criteria. Mesh generation methods are presented for triangular/tetrahedral and quadrilateral/hexahedral meshes, with a special section on initial meshes for the sphere.
Download or read book Modeling of Process Intensification written by Frerich J. Keil and published by John Wiley & Sons. This book was released on 2007-04-09 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining the knowledge involved in process engineering and process modeling, this is the first book to cover all modeling methods applicable to process intensification. Both the editors and authors are renowned experts from industry and academia in the various fields of process modeling and integrated chemical processes. Following an introduction to the topic, the book goes on to look at equipment and operational methods, monolithic catalysis, HEX, micro- and reverse flow reactors, catalytic and reactive distillation, the simulated-moving bed and vibration bubble column as well as ultrasound and ultrasonic reactors. A final chapter is devoted to processes under supercritical conditions. In its treatment of hot topics of multidisciplinary interest, this book is of great value to researchers and engineers alike.
Download or read book Flow Modulation and Fluid Structure Interaction at Airplane Wings written by Josef Ballmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research work of the collaborative research center SFB401 Flow Modulation and Fluid-Structure Interaction at Airplane Wings at the Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen, which is reported in this book, was pos sible due to the financial support of the Deutsche Forschungsgemeinschaft (DFG). The proposal has been approved after evaluation by the referees of DFG selected from other universities and industry, which is gratefully acknowledged. The work is still in progress and now approved to continue until the end of year 2005. More than 50 scientists from universities of the United States, Russia, France, Italy, Japan, Great Britain, Sweden, Netherlands, Switzerland, Austria and research orga nizations NASA, ONERA, NLR, DLR could be invited and have visited the research center, gave seminars on their research on related topics and some of them stayed longer for joined work. Besides its scientific value, also the importance of the pro gram for scientific educa tion becomes evident by looking at the numbers of completed theses, which are up to now about 15 doctoral theses, 40 diploma theses and 70 study theses. The authors of this book acknowledge the valuable support coming from all these persons and institutions. They are especially grateful to the referees having reviewed this work, A. Cohen (Universite Pierre et Marie Curie), J. Cooper (Manchester School of Engineering), W. Devenport (Virginia Tech.), M. Drela (MIT), F. Gern (Avionics Specialties Inc.), A. Griewank (TU Dresden), H. Hönlinger (DLR), P.
