An adaptive fast multipole accelerated Poisson solver for complex geometries
- Univ. of Washington, Seattle, WA (United States); DOE/OSTI
- New York Univ. (NYU), NY (United States)
Here, we present a fast, direct and adaptive Poisson solver for complex two-dimensional geometries based on potential theory and fast multipole acceleration. More precisely, the solver relies on the standard decomposition of the solution as the sum of a volume integral to account for the source distribution and a layer potential to enforce the desired boundary condition. The volume integral is computed by applying the FMM on a square box that encloses the domain of interest. For the sake of efficiency and convergence acceleration, we first extend the source distribution (the right-hand side in the Poisson equation) to the enclosing box as a $$C$$0 function using a fast, boundary integral-based method. We demonstrate on multiply connected domains with irregular boundaries that this continuous extension leads to high accuracy without excessive adaptive refinement near the boundary and, as a result, to an extremely efficient “black box” fast solver.
- Research Organization:
- New York Univ. (NYU), NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); US Air Force Office of Scientific Research (AFOSR)
- Grant/Contract Number:
- FG02-86ER53223; FG02-88ER25053; SC0012398
- OSTI ID:
- 1533962
- Alternate ID(s):
- OSTI ID: 1398114
- Journal Information:
- Journal of Computational Physics, Journal Name: Journal of Computational Physics Vol. 344; ISSN 0021-9991
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Integral Equation Formulation of the Biharmonic Dirichlet Problem
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journal | September 2017 |
| Adaptive quadrature by expansion for layer potential evaluation in two dimensions | text | January 2017 |
| Distributed and Adaptive Fast Multipole Method In Three Dimensions | preprint | January 2020 |
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