title: Simulations of hydrodynamic phenomena in stellar interiors
creator: Horst, Leonhard
subject: ddc-520
subject: 520 Astronomy and allied sciences
subject: ddc-530
subject: 530 Physics
description: This thesis presents multidimensional hydrodynamic simulations of stellar interiors with a  focus on dynamical phenomena at low Mach numbers using the Seven-League Hydro  (SLH) code. A better understanding of these phenomena is crucial to improve the modeling  of stellar evolution. It is demonstrated that suitable numerical methods are required to  avoid that numerical artifacts and spurious dissipation dominate the actual physical flow.  Three-dimensional simulations of convective helium shell burning are used to measure the  entrainment of mass into the convective region. This aids the parametrization of entrainment  in one-dimensional evolution calculations. Furthermore, the excitation of waves by core  convection is simulated and the results are analyzed regarding their physical plausibility and  agreement with observations. These simulations demonstrate that the current set of numerical  methods used by the SLH code is promising regarding future, more realistic simulations of  astrophysical flows.
date: 2021
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/30840/1/Dissertation_Leonhard_Horst_2021_SW.pdf
identifier: DOI:10.11588/heidok.00030840
identifier: urn:nbn:de:bsz:16-heidok-308405
identifier:   Horst, Leonhard  (2021) Simulations of hydrodynamic phenomena in stellar interiors.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/30840/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng