eprintid: 30840
rev_number: 28
eprint_status: archive
userid: 6341
dir: disk0/00/03/08/40
datestamp: 2021-12-10 08:45:34
lastmod: 2021-12-17 07:03:33
status_changed: 2021-12-10 08:45:34
type: doctoralThesis
metadata_visibility: show
creators_name: Horst, Leonhard
title: Simulations of hydrodynamic phenomena in stellar interiors
subjects: ddc-520
subjects: ddc-530
divisions: i-130001
divisions: i-741010
divisions: i-999906
adv_faculty: af-13
cterms_swd: Numerische Strömungssimulation
cterms_swd: Konvektion
cterms_swd: Sternentwicklung
abstract: 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
id_scheme: DOI
id_number: 10.11588/heidok.00030840
ppn_swb: 1782090592
own_urn: urn:nbn:de:bsz:16-heidok-308405
date_accepted: 2021-12-01
advisor: HASH(0x558ea2549870)
language: eng
bibsort: HORSTLEONHSIMULATION2021
full_text_status: public
place_of_pub: Heidelberg
citation:   Horst, Leonhard  (2021) Simulations of hydrodynamic phenomena in stellar interiors.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/30840/1/Dissertation_Leonhard_Horst_2021_SW.pdf