Meshfree methods on manifolds for hydrodynamic flows on curved surfaces: A Generalized Moving Least-Squares (GMLS) approach
Journal Article
·
· Journal of Computational Physics
- Univ. of California, Santa Barbara, CA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
We utilize generalized moving least squares (GMLS) to develop meshfree techniques for discretizing hydrodynamic flow problems on manifolds. We use exterior calculus to formulate incompressible hydrodynamic equations in the Stokesian regime and handle the divergence-free constraints via a generalized vector potential. This provides less coordinate-centric descriptions and enables the development of efficient numerical methods and splitting schemes for the fourth-order governing equations in terms of a system of second-order elliptic operators. Using a Hodge decomposition, we develop methods for manifolds having spherical topology. We show the methods exhibit high-order convergence rates for solving hydrodynamic flows on curved surfaces. The methods also provide general high-order approximations for the metric, curvature, and other geometric quantities of the manifold and associated exterior calculus operators. The approaches also can be utilized to develop high-order solvers for other scalar-valued and vector-valued problems on manifolds.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Univ. of California, Santa Barbara, CA (United States); University of California, Santa Barbara, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
- Grant/Contract Number:
- AC04-94AL85000; SC0019246
- OSTI ID:
- 1619207
- Alternate ID(s):
- OSTI ID: 1602294
OSTI ID: 2331459
OSTI ID: 1633912
- Report Number(s):
- SAND--2019-5752J; 675748
- Journal Information:
- Journal of Computational Physics, Journal Name: Journal of Computational Physics Journal Issue: C Vol. 409; ISSN 0021-9991
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Recycling augmented Lagrangian preconditioner in an incompressible fluid solver
|
journal | October 2021 |
| Graph Convolutional Neural Networks for Body Force Prediction | text | January 2020 |
| Variational Autoencoders for Learning Nonlinear Dynamics of Physical Systems | preprint | January 2020 |
Similar Records
Compatible meshfree discretization of surface PDEs
Journal Article
·
2019
· Computational Particle Mechanics
·
OSTI ID:1528998