The Athena++ Adaptive Mesh Refinement Framework: Multigrid Solvers for Self-gravity
抄録
<jats:title>Abstract</jats:title> <jats:p>We describe the implementation of multigrid solvers in the Athena++ adaptive mesh refinement (AMR) framework and their application to the solution of the Poisson equation for self-gravity. The new solvers are built on top of the AMR hierarchy and TaskList framework of Athena++ for efficient parallelization. We adopt a conservative formulation for the Laplacian operator that avoids artificial accelerations at level boundaries. Periodic, fixed, and zero-gradient boundary conditions are implemented, as well as open boundary conditions based on a multipole expansion. Hybrid parallelization using both Message Passing Interface and OpenMP is adopted, and we present results of tests demonstrating the accuracy and scaling of the methods. On a uniform grid, we show that multigrid significantly outperforms methods based on fast Fourier transforms, and requires only a small fraction of the computing time required by the (highly optimized) magnetohydrodynamic solver in Athena++. As a demonstration of the capabilities of the methods, we present the results of a test calculation of magnetized protostellar collapse on an adaptive mesh.</jats:p>
収録刊行物
-
- The Astrophysical Journal Supplement Series
-
The Astrophysical Journal Supplement Series 266 (1), 7-, 2023-04-27
American Astronomical Society
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1360017282199569792
-
- ISSN
- 15384365
- 00670049
-
- データソース種別
-
- Crossref
- KAKEN