Electrostatic Force Computation with Boundary Element Methods
The SMAI Journal of computational mathematics, Volume 8 (2022), pp. 49-74.

Boundary element methods are a well-established technique for solving linear boundary value problems for electrostatic potentials. In this context we present a novel way to approximate the forces exerted by electrostatic fields on conducting objects. Like the standard post-processing technique employing surface integrals derived from the Maxwell stress tensor the new approach solely relies on surface integrals, but, compared to the former, offers better accuracy and faster convergence.

The new formulas arise from the interpretation of forces fields as shape derivatives, in the spirit of the virtual work principle, combined with the adjoint approach from shape optimization. In contrast to standard formulas, they meet the continuity and smoothing requirements of abstract duality arguments, which supply a rigorous underpinning for their observed superior performance.

Published online:
DOI: 10.5802/smai-jcm.79
Classification: 65N38, 78M15, 45A05
Keywords: Electrostatics, electromagnetic forces, shape derivative, boundary integral equations, boundary element method
Piyush Panchal 1; Ralf Hiptmair 1

1 SAM, D-MATH, ETH Zurich, CH-8092 Zürich
License: CC-BY-NC-ND 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights
     author = {Piyush Panchal and Ralf Hiptmair},
     title = {Electrostatic {Force} {Computation} with {Boundary} {Element} {Methods}},
     journal = {The SMAI Journal of computational mathematics},
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     publisher = {Soci\'et\'e de Math\'ematiques Appliqu\'ees et Industrielles},
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Piyush Panchal; Ralf Hiptmair. Electrostatic Force Computation with Boundary Element Methods. The SMAI Journal of computational mathematics, Volume 8 (2022), pp. 49-74. doi : 10.5802/smai-jcm.79. https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.79/

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