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• W2276306181 abstract "Spectral methods are an efficient way to solve partial differential equations on domains possessing certain symmetries. The utility of a method depends strongly on the choice of spectral basis. In this paper we describe a set of bases built out of Jacobi polynomials, and associated operators for solving scalar, vector, and tensor partial differential equations in polar coordinates on a unit disk. By construction, the bases satisfy regularity conditions at r=0 for any tensorial field. The coordinate singularity in a disk is a prototypical case for many coordinate singularities. The work presented here extends to other geometries. The operators represent covariant derivatives, multiplication by azimuthally symmetric functions, and the tensorial relationship between fields. These arise naturally from relations between classical orthogonal polynomials, and form a Heisenberg algebra. Other past work uses more specific polynomial bases for solving equations in polar coordinates. The main innovation in this paper is to use a larger set of possible bases to achieve maximum bandedness of linear operations. We provide a series of applications of the methods, illustrating their ease-of-use and accuracy." @default.
• W2276306181 created "2016-06-24" @default.
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• W2276306181 date "2016-11-01" @default.
• W2276306181 modified "2023-10-15" @default.
• W2276306181 title "Tensor calculus in polar coordinates using Jacobi polynomials" @default.
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• W2276306181 doi "https://doi.org/10.1016/j.jcp.2016.08.013" @default.
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