A Meshfree Collocation Scheme for Surface Differential Operators on Point Clouds
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
We present a meshfree collocation scheme to discretize intrinsic surface differential operators over scalar fields on smooth curved surfaces with given normal vectors and a non-intersecting tubular neighborhood. The method is based on discretization-corrected particle strength exchange (DC-PSE), which generalizes finite difference methods to meshfree point clouds. The proposed Surface DC-PSE method is derived from an embedding theorem, but we analytically reduce the operator kernels along surface normals to obtain a purely intrinsic computational scheme over surface point clouds. We benchmark Surface DC-PSE by discretizing the Laplace–Beltrami operator on a circle and a sphere, and we present convergence results for both explicit and implicit solvers. We then showcase the algorithm on the problem of computing Gauss and mean curvature of an ellipsoid and of the Stanford Bunny by approximating the intrinsic divergence of the normal vector field. Finally, we compare Surface DC-PSE with surface finite elements (SFEM) and diffuse-interface finite elements (DI FEM) in a validation case.
Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 89 |
| Seitenumfang | 19 |
| Fachzeitschrift | Journal of scientific computing |
| Jahrgang | 96 (2023) |
| Ausgabenummer | 3 |
| Publikationsstatus | Veröffentlicht - 7 Aug. 2023 |
| Peer-Review-Status | Ja |
Externe IDs
| ORCID | /0000-0003-4414-4340/work/159608266 |
|---|
Schlagworte
ASJC Scopus Sachgebiete
- Software - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
- Theoretische Informatik - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
- Numerische Mathematik - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
- Allgemeiner Maschinenbau - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
- Computational Mathematics - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
- Theoretische Informatik und Mathematik - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
- Angewandte Mathematik - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
Schlagwörter
- Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators
Bibliotheksschlagworte
- 004 Informatik - Collocation, Intrinsic calculus, Meshfree methods, Partial differential equations on surfaces, Surface differential operators