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• W1502149659 abstract "The physical systems have the mathematical models a set of partial-derivatives equations and only in some particular assumptions we approximate them by lumped-parameter models. Although a tremendous variety of parallel numerical methods have been proposed for simulation of these systems, the most invented parallel computational strategies are largely based on the finite element (FE) and multigrid methods. The programs for the simulation of the distributed-parameter systems have an inherent parallelism when finite element method (FEM) method is used.In many engineering applications in the area of field computation, the numerical models are based on FEM. The finite element programs have a modular form in accordance with the stages of the method: pre-processing, solution (processing) and post-processing.The technique of dividing a large physical system into a system of components is very old and is still used extensively. In this way different components are designed in parallel by different groups of researchers or companies. It is obviously that this traditional approach can be used with parallel computers if the FEM is used for numerical models.In this lecture we present several parallel computational strategies for the FE applications. The fact that the finite element method is central to many modern engineering simulations constitutes a real motivation for its consideration in this presentation. Another motivation is based upon some of the algorithmic issues raised by the FE method in comparison with other methods like the difference finite methods. The FE method can handle discrete meshes with an irregular or complicated distribution of points. The matrix of linear equation coefficients has not a regular, predictable structure characteristic of the finite difference method.Another main motivation to consider the FEM is the existence of a large amount of software developed for conventional computers based on it. The justification of this large amount of software products in this area consists in the facility with which the FEM can be used to handle many physical problems described by partial differential derivatives equations.As target examples we present practical problems from electrical engineering using coupled models. Motivations for these models are justified. Many areas of electrical engineering require the solution of problem in which the electromagnetic field equations are coupled to other partial differential equations, such as those describing thermal field, fluid flow or stress behaviour. These phenomena are described by equations that are coupled. The coupling between the fields is a natural phenomenon and only in a simplified approach the field analysis can be treated as independent problem.As a parallel implementation of the FE programs, the domain decomposition method is presented. The domain decomposition is guided by physical considerations. Parallelism is obviously in every stage of the FE program and these parallelism facets we present in our lecture. Finally we discuss about the implementation aspects of the domain decomposition approach in the context of our target examples." @default.
• W1502149659 created "2016-06-24" @default.
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• W1502149659 date "2008-09-11" @default.
• W1502149659 modified "2023-09-22" @default.
• W1502149659 title "Plenary lecture I: parallel processing in finite element programs for engineering applications" @default.
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