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  • Efficient boundary element method solution of potential problems that are large, linear and involve optimization of boundary geometry

    Author(s)
    Gale, TJ
    Johnston, PR
    Kilpatrick, D
    Griffith University Author(s)
    Johnston, Peter R.
    Year published
    2002
    Metadata
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    Abstract
    A method was developed for efficient boundary element method solution of potential problems that were large, linear and involved optimization of boundary geometry. The method involved forming an optimization region containing the section of boundary to be optimized, and an invariant region incorporating the remainder of the problem. Solution was by Gaussian elimination. Matrix elements arising from boundary discretization and application of the governing equations were manipulated to permit computations relating to the invariant region to be performed only once. The matrix and vector terms for the invariant region were first ...
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    A method was developed for efficient boundary element method solution of potential problems that were large, linear and involved optimization of boundary geometry. The method involved forming an optimization region containing the section of boundary to be optimized, and an invariant region incorporating the remainder of the problem. Solution was by Gaussian elimination. Matrix elements arising from boundary discretization and application of the governing equations were manipulated to permit computations relating to the invariant region to be performed only once. The matrix and vector terms for the invariant region were first calculated, the matrix converted to upper-diagonal form and the values stored. For each boundary configuration within the optimization region, additional matrix elements were computed and appended to the pre-computed matrix. The complete set of equations were subsequently solved by conversion of the appended matrix terms to upper-diagonal form, followed by back-substitution. A practical example involved determining the electric field arising due to different electrodes implanted in the human heart. Computation time was found to be an order of magnitude less for the second and subsequent electrode configurations than for the first. The method may find application in boundary element method optimization problems involving complex or large regions.
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    Journal Title
    Communications in Numerical Methods in Engineering
    Volume
    18
    Publisher URI
    https://onlinelibrary.wiley.com/doi/abs/10.1002/cnm.542
    DOI
    https://doi.org/10.1002/cnm.542
    Copyright Statement
    © 2002 John Wiley & Sons, Ltd. Self-archiving of the author-manuscript version is not yet supported by this publisher. Please refer to the journal link for access to the definitive, published version or contact the author for more information.
    Subject
    Mathematical sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/7020
    Collection
    • Journal articles

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