General Implicit Runge-Kutta Integrators for Multifluid Gas-Dust Aerodynamic Drag
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914149849628672 |
|---|---|
| author | Tedeschi-Prades, Giovanni Birnstiel, Til Dolag, Klaus Ercolano, Barbara Hutchison, Mark |
| author_facet | Tedeschi-Prades, Giovanni Birnstiel, Til Dolag, Klaus Ercolano, Barbara Hutchison, Mark |
| contents | The integration of aerodynamic drag is a fundamental step in simulating dust dynamics in hydrodynamical simulations. We propose a novel integration scheme, designed to be compatible with Strang splitting techniques, which allows for the straightforward integration of external forces and hydrodynamic fluxes in general-purpose hydrodynamic simulation codes. Moreover, this solver leverages an analytical solution to the problem of drag acceleration, ensuring linear complexity even in cases with multiple dust grain sizes, as opposed to the cubic scaling of methods that require a matrix inversion step. This new General Implicit Runge-Kutta integrator (GIRK) is evaluated using standard benchmarks for dust dynamics such as DUSTYBOX, DUSTYWAVE, and DUSTYSHOCK. The results demonstrate not only the accuracy of the method but also the expected scalings in terms of accuracy, convergence to equilibrium, and execution time. GIRK can be easily implemented in hydrodynamical simulations alongside hydrodynamical steps and external forces, and is especially useful in simulations with a large number of dust grain sizes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_07562 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | General Implicit Runge-Kutta Integrators for Multifluid Gas-Dust Aerodynamic Drag Tedeschi-Prades, Giovanni Birnstiel, Til Dolag, Klaus Ercolano, Barbara Hutchison, Mark Instrumentation and Methods for Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics Fluid Dynamics The integration of aerodynamic drag is a fundamental step in simulating dust dynamics in hydrodynamical simulations. We propose a novel integration scheme, designed to be compatible with Strang splitting techniques, which allows for the straightforward integration of external forces and hydrodynamic fluxes in general-purpose hydrodynamic simulation codes. Moreover, this solver leverages an analytical solution to the problem of drag acceleration, ensuring linear complexity even in cases with multiple dust grain sizes, as opposed to the cubic scaling of methods that require a matrix inversion step. This new General Implicit Runge-Kutta integrator (GIRK) is evaluated using standard benchmarks for dust dynamics such as DUSTYBOX, DUSTYWAVE, and DUSTYSHOCK. The results demonstrate not only the accuracy of the method but also the expected scalings in terms of accuracy, convergence to equilibrium, and execution time. GIRK can be easily implemented in hydrodynamical simulations alongside hydrodynamical steps and external forces, and is especially useful in simulations with a large number of dust grain sizes. |
| title | General Implicit Runge-Kutta Integrators for Multifluid Gas-Dust Aerodynamic Drag |
| topic | Instrumentation and Methods for Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics Fluid Dynamics |
| url | https://arxiv.org/abs/2511.07562 |