Potential integrals on triangles

Details Potential integrals on triangles Potential integrals on triangles

2012-01-24

arxiv.org/abs/1201.4938v1

Mathematics

Numerical Analysis

Submitted to International Journal for Numerical Methods in Engineering

Scientific paper

The problem of evaluating potential integrals on planar triangular elements has been addressed using a polar coordinate decomposition. The resulting formulae are general, exact, easily implemented, and have only one special case, that of a field point lying in the plane of the element. Results are presented for the evaluation of the potential and its gradients, where the integrals must be treated as principal values or finite parts, for elements with constant and linearly varying source terms. These results are tested by application to a single triangular element to the evaluation of the potential gradient outside the unit cube. In both cases, the method is shown to be accurate and convergent.

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