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Author: Viktor G. Ganža
Publisher:
ISBN:
Category :
Languages : de
Pages : 25
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Author: Viktor G. Ganža
Publisher:
ISBN:
Category :
Languages : de
Pages : 25
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Author: Lourenco Beirao da Veiga
Publisher: Springer
ISBN: 3319026631
Category : Mathematics
Languages : en
Pages : 399
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Book Description
This book describes the theoretical and computational aspects of the mimetic finite difference method for a wide class of multidimensional elliptic problems, which includes diffusion, advection-diffusion, Stokes, elasticity, magnetostatics and plate bending problems. The modern mimetic discretization technology developed in part by the Authors allows one to solve these equations on unstructured polygonal, polyhedral and generalized polyhedral meshes. The book provides a practical guide for those scientists and engineers that are interested in the computational properties of the mimetic finite difference method such as the accuracy, stability, robustness, and efficiency. Many examples are provided to help the reader to understand and implement this method. This monograph also provides the essential background material and describes basic mathematical tools required to develop further the mimetic discretization technology and to extend it to various applications.
Author: Jose E. Castillo
Publisher: CRC Press
ISBN: 1466513446
Category : Mathematics
Languages : en
Pages : 256
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Book Description
To help solve physical and engineering problems, mimetic or compatible algebraic discretization methods employ discrete constructs to mimic the continuous identities and theorems found in vector calculus. Mimetic Discretization Methods focuses on the recent mimetic discretization method co-developed by the first author. Based on the Castillo-Grone operators, this simple mimetic discretization method is invariably valid for spatial dimensions no greater than three. The book also presents a numerical method for obtaining corresponding discrete operators that mimic the continuum differential and flux-integral operators, enabling the same order of accuracy in the interior as well as the domain boundary. After an overview of various mimetic approaches and applications, the text discusses the use of continuum mathematical models as a way to motivate the natural use of mimetic methods. The authors also offer basic numerical analysis material, making the book suitable for a course on numerical methods for solving PDEs. The authors cover mimetic differential operators in one, two, and three dimensions and provide a thorough introduction to object-oriented programming and C++. In addition, they describe how their mimetic methods toolkit (MTK)-available online-can be used for the computational implementation of mimetic discretization methods. The text concludes with the application of mimetic methods to structured nonuniform meshes as well as several case studies. Compiling the authors' many concepts and results developed over the years, this book shows how to obtain a robust numerical solution of PDEs using the mimetic discretization approach. It also helps readers compare alternative methods in the literature.
Author: Mikhail Shashkov
Publisher: CRC Press
ISBN: 1351458299
Category : Mathematics
Languages : en
Pages : 384
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Book Description
This new book deals with the construction of finite-difference (FD) algorithms for three main types of equations: elliptic equations, heat equations, and gas dynamic equations in Lagrangian form. These methods can be applied to domains of arbitrary shapes. The construction of FD algorithms for all types of equations is done on the basis of the support-operators method (SOM). This method constructs the FD analogs of main invariant differential operators of first order such as the divergence, the gradient, and the curl. This book is unique because it is the first book not in Russian to present the support-operators ideas. Conservative Finite-Difference Methods on General Grids is completely self-contained, presenting all the background material necessary for understanding. The book provides the tools needed by scientists and engineers to solve a wide range of practical engineering problems. An abundance of tables and graphs support and explain methods. The book details all algorithms needed for implementation. A 3.5" IBM compatible computer diskette with the main algorithms in FORTRAN accompanies text for easy use.
Author:
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Category :
Languages : en
Pages :
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This thesis describes higher-order finite difference methods for solving elliptic equations on irregular domains with general boundary conditions and the corresponding elliptic interface problems. We develop second and fourth order methods for two and three dimensions using uniform Cartesian grids. However, with an irregular domain we cannot apply the standard finite difference schemes directly at the grid points near the boundary and therefore some treatment is required in order to use the uniform Cartesian grids. Our approach involves modifying the standard finite difference schemes. In particular, we use the standard five-point and standard compact nine-point stencil schemes for the second and fourth order methods, respectively. That is, on the standard stencils that contain the boundary, we carry out the modification by applying the continuation of solution from the inside of domain to the outside. The method of continuation of solution uses Taylor series expansion of the solution about selected boundary points, the equation and the boundary values of the local and their nearby boundary points. Naturally, second and fourth order Taylor series expansions about the boundary points are used for the second and fourth order methods respectively. Our methods have a unified and an effective approach to deal with general boundary conditions and capture the boundary and its local geometrical properties by the level set function and the local coordinate system at the boundary points. The resulting finite difference system matrices of our methods remain symmetric positive definite and maintain the sparsity of the standard finite difference schemes. As part of our main objective, we apply our fourth order method to semi-discretize the corresponding parabolic equation in space on the irregular domain and obtain an ODE system. The validity and effectiveness of the proposed method is clearly demonstrated through the computation of eigenvalues of the associated eigenvalue probl.
Author: Zi-Cai Li
Publisher: World Scientific
ISBN: 9789810202927
Category : Mathematics
Languages : en
Pages : 286
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Book Description
This book presents two kinds of numerical methods for solving elliptic boundary value problems with singularities. Part I gives the boundary methods which use analytic and singular expansions, and Part II the nonconforming methods combining finite element methods (FEM) (or finite difference methods (FDM)) and singular (or analytic) expansions. The advantage of these methods over the standard FEM and FDM is that they can cope with complicated geometrical boundaries and boundary conditions as well as singularity. Therefore, accurate numerical solutions near singularities can be obtained. The description of methods, error bounds, stability analysis and numerical experiments are provided for the typical problems with angular, interface and infinity singularities. However, the approximate techniques and coupling strategy given can be applied to solving other PDE and engineering problems with singularities as well. This book is derived from the author's Ph. D. thesis which won the 1987 best doctoral dissertation award given by the Canadian Applied Mathematics Society.
Author: Ivan Dimov
Publisher: Springer
ISBN: 3319202391
Category : Computers
Languages : en
Pages : 443
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Book Description
This book constitutes the thoroughly refereed post-conference proceedings of the 6th International Conference on Finite Difference Methods, FDM 2014, held in Lozenetz, Bulgaria, in June 2014. The 36 revised full papers were carefully reviewed and selected from 62 submissions. These papers together with 12 invited papers cover topics such as finite difference and combined finite difference methods as well as finite element methods and their various applications in physics, chemistry, biology and finance.
Author: Yaw Kyei
Publisher:
ISBN:
Category :
Languages : en
Pages : 151
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Book Description
Keywords: Irregular Domains, Cartesian Grid, boundary control, optimization, Elliptic Equations, open and closed loop eigenvalues, Semi-discretization, state feedback control, Higher-Order finite difference method, standard compact 9-point stencil, Heat Equation, Elliptic Interface Problems, continuation of solution.
Author: Vladimir D. Liseikin
Publisher: Springer Science & Business Media
ISBN: 9048129125
Category : Science
Languages : en
Pages : 390
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Book Description
This text is an introduction to methods of grid generation technology in scientific computing. Special attention is given to methods developed by the author for the treatment of singularly-perturbed equations, e.g. in modeling high Reynolds number flows. Functionals of conformality, orthogonality, energy and alignment are discussed.
Author: Damien V. Weldon
Publisher:
ISBN:
Category : Differential equations, Elliptic
Languages : en
Pages : 58
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