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Improved Methods for General Relativistic Radiation Hydrodynamics and Their Impact on Simulations of Neutron Star Mergers and Core-Collapse Supernovae
Improved Methods for General Relativistic Radiation Hydrodynamics and Their Impact on Simulations of Neutron Star Mergers and Core-Collapse Supernovae
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152140
- ISBN
- 9798383570807
- DDC
- 523
- 서명/저자
- Improved Methods for General Relativistic Radiation Hydrodynamics and Their Impact on Simulations of Neutron Star Mergers and Core-Collapse Supernovae
- 발행사항
- [Sl] : Michigan State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 224 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
- 주기사항
- Advisor: Couch, Sean.
- 학위논문주기
- Thesis (Ph.D.)--Michigan State University, 2024.
- 초록/해제
- 요약Neutron star mergers and core-collapse supernovae are some of the most energetic events in the universe, reaching conditions not attainable in terrestrial laboratories. The study of these high energy-density astrophysical events relies on detailed multi-physics multi-scale modeling, ranging from nuclear and neutrino interactions to the large-scale dynamics governed by general relativity. Simulations prove useful in exploring these models, but they are sensitive to the physical approximations and numerical methods used to build them, requiring a balance to be struck between higher computational cost and increasingly detailed physical models. Choices made for the treatment of the neutrinos and the inclusion of general relativistic effects greatly impact the dynamics of how these systems evolve, and impact the nucleosynthesis that occurs during these events. The Flash-X multi-physics code provides an ideal framework for creating the large-scale simulations necessary for studying both core-collapse supernovae and neutron star mergers. This dissertation will detail extending the capabilities in Flash-X with the addition of fully general relativistic solvers for neutrino radiation transport, hydrodynamics, a dynamic spacetime, the supporting infrastructure necessary for coupling them all together, and utilities to facilitate development of these solvers. A multi-group two-moment neutrino radiation transport solver makes use of a novel frequency discretization to improve computational efficiency. A high-order finite-difference scheme is applied to the hydrodynamics. A custom-built code-generator aids in the development of the dynamic spacetime solvers. A new method-of-lines time-discretization in Flash-X provides increased numerical stability and flexibility in choosing time-integration schemes appropriate for both the new and existing solvers. A full suite of rigorous tests validate these capabilities. Continuing work towards the coupled multi-physics multi-scale simulations necessary for neutron star mergers and core-collapse supernovae will be presented.
- 일반주제명
- Astrophysics
- 일반주제명
- Computational physics
- 일반주제명
- Nuclear physics
- 일반주제명
- Physics
- 키워드
- Hydrodynamics
- 기타저자
- Michigan State University Physics - Doctor of Philosophy
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152140
■006m o d
■007cr#unu||||||||
■020 ▼a9798383570807
■035 ▼a(MiAaPQ)AAI31484757
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aFromm, Steven Anthony.▼0(orcid)0000-0002-3591-123X
■24510▼aImproved Methods for General Relativistic Radiation Hydrodynamics and Their Impact on Simulations of Neutron Star Mergers and Core-Collapse Supernovae
■260 ▼a[Sl]▼bMichigan State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a224 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-01, Section: B.
■500 ▼aAdvisor: Couch, Sean.
■5021 ▼aThesis (Ph.D.)--Michigan State University, 2024.
■520 ▼aNeutron star mergers and core-collapse supernovae are some of the most energetic events in the universe, reaching conditions not attainable in terrestrial laboratories. The study of these high energy-density astrophysical events relies on detailed multi-physics multi-scale modeling, ranging from nuclear and neutrino interactions to the large-scale dynamics governed by general relativity. Simulations prove useful in exploring these models, but they are sensitive to the physical approximations and numerical methods used to build them, requiring a balance to be struck between higher computational cost and increasingly detailed physical models. Choices made for the treatment of the neutrinos and the inclusion of general relativistic effects greatly impact the dynamics of how these systems evolve, and impact the nucleosynthesis that occurs during these events. The Flash-X multi-physics code provides an ideal framework for creating the large-scale simulations necessary for studying both core-collapse supernovae and neutron star mergers. This dissertation will detail extending the capabilities in Flash-X with the addition of fully general relativistic solvers for neutrino radiation transport, hydrodynamics, a dynamic spacetime, the supporting infrastructure necessary for coupling them all together, and utilities to facilitate development of these solvers. A multi-group two-moment neutrino radiation transport solver makes use of a novel frequency discretization to improve computational efficiency. A high-order finite-difference scheme is applied to the hydrodynamics. A custom-built code-generator aids in the development of the dynamic spacetime solvers. A new method-of-lines time-discretization in Flash-X provides increased numerical stability and flexibility in choosing time-integration schemes appropriate for both the new and existing solvers. A full suite of rigorous tests validate these capabilities. Continuing work towards the coupled multi-physics multi-scale simulations necessary for neutron star mergers and core-collapse supernovae will be presented.
■590 ▼aSchool code: 0128.
■650 4▼aAstrophysics
■650 4▼aComputational physics
■650 4▼aNuclear physics
■650 4▼aPhysics
■653 ▼aHydrodynamics
■653 ▼aNeutron star mergers
■653 ▼aNumerical relativity
■653 ▼aRadiation transport
■653 ▼aComputational cost
■690 ▼a0596
■690 ▼a0216
■690 ▼a0756
■690 ▼a0605
■71020▼aMichigan State University▼bPhysics - Doctor of Philosophy.
■7730 ▼tDissertations Abstracts International▼g86-01B.
■790 ▼a0128
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163143▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
