Abstract
Current multi-physics Finite Element Method (FEM) solvers are complex systems in terms of both their mathematical complexity and lines of code. This paper proposes a skeleton generic FEM solver, named MetaFEM, in total about 6,000 lines of Julia code, which translates generic input Partial Differential Equation (PDE) weak forms into corresponding GPU-accelerated simulations with a grammar similar to FEniCS or FreeFEM. Two novel approaches differentiate MetaFEM from the common solvers: (1) the FEM kernel is based on an original theory/algorithm which explicitly processes meta-expressions, as the name suggests, and (2) the symbolic engine is a rule-based Computer Algebra System (CAS), i.e., the equations are rewritten/derived according to a set of rewriting rules instead of going through completely fixed routines, supporting easy customization by developers. Example cases in thermal conduction, linear elasticity and incompressible flow are presented to demonstrate utility.
| Original language | English (US) |
|---|---|
| Article number | 114907 |
| Journal | Computer Methods in Applied Mechanics and Engineering |
| Volume | 394 |
| DOIs | |
| State | Published - May 1 2022 |
Funding
This work was funded by the Department of Defense Vannevar Bush Faculty Fellowship, USA N00014-19-1-2642 .
Keywords
- Continuum mechanics
- Finite element
- MetaFEM
- Rewriting system
ASJC Scopus subject areas
- Computational Mechanics
- Mechanics of Materials
- Mechanical Engineering
- General Physics and Astronomy
- Computer Science Applications