Moving and Reactive Boundary Conditions in Moving-Mesh Hydrodynamics
| Autor: | Logan J. Prust |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
010308 nuclear & particles physics Boundary (topology) FOS: Physical sciences Astronomy and Astrophysics Mechanics Computational Physics (physics.comp-ph) 01 natural sciences Conserved quantity Gravitation Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science 0103 physical sciences Convergence (routing) Sod shock tube Supersonic speed Boundary value problem 010303 astronomy & astrophysics Physics - Computational Physics Blast wave Solar and Stellar Astrophysics (astro-ph.SR) |
| Popis: | We outline the methodology of implementing moving boundary conditions into the moving-mesh code MANGA. The motion of our boundaries is reactive to hydrodynamic and gravitational forces. We discuss the hydrodynamics of a moving boundary as well as the modifications to our hydrodynamic and gravity solvers. Appropriate initial conditions to accurately produce a boundary of arbitrary shape are also discussed. Our code is applied to several test cases, including a Sod shock tube, a Sedov-Taylor blast wave and a supersonic wind on a sphere. We show the convergence of conserved quantities in our simulations. We demonstrate the use of moving boundaries in astrophysical settings by simulating a common envelope phase in a binary system, in which the companion object is modeled by a spherical boundary. We conclude that our methodology is suitable to simulate astrophysical systems using moving and reactive boundary conditions. 12 pages, 8 figures, submitted to MNRAS |
| Databáze: | OpenAIRE |
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