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Discontinuous Galerkin Methods for Nonlinear and Nonlocal Wave Equations
Discontinuous Galerkin Methods for Nonlinear and Nonlocal Wave Equations
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103622
- ISBN
- 9798291542323
- DDC
- 519
- 저자명
- Zhou, Yin.
- 서명/저자
- Discontinuous Galerkin Methods for Nonlinear and Nonlocal Wave Equations
- 발행사항
- [Sl] : Columbia University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 108 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Ren, Kui;Zhang, Lu.
- 학위논문주기
- Thesis (Ph.D.)--Columbia University, 2025.
- 초록/해제
- 요약This dissertation develops and analyzes discontinuous Galerkin (DG) methods for two wave propagation problems: the nonlinear Schrodinger equation with wave operator (NLSW) and the nonlocal wave equation (NLW). These models arise in diverse physical and engineering contexts ranging from plasma physics to peridynamic solid mechanics, and pose significant numerical challenges due to their dispersive, nonlinear, and nonlocal behavior. Efficient numerical algorithms for these problems are essential for accurately simulating phenomena such as soliton dynamics and long-range interactions.For the NLSW model, we propose an energy-based DG formulation that preserves discrete energy properties and admits optimal convergence in the L2 norm. A key component of the method is the introduction of an auxiliary variable along with the careful design of mesh-independent numerical fluxes. We establish rigorous stability and error estimates for the semi-discrete scheme. To handle the time dimension, we employ a strong-stability-preserving Runge-Kutta (SSPRK) scheme, ensuring robust and accurate temporal integration. The method is validated through extensive numerical simulations in one and two spatial dimensions.For the NLW model, we construct and analyze a DG method that accommodates spatial nonlocality and is capable of capturing the asymptotic transition to local models. We discretize in time via a Crank-Nicolson scheme, combining second-order accuracy with favorable stability properties. The method preserves energy at the fully-discrete level and exhibits optimal convergence rates for a broad class of nonlocal kernels. We further establish asymptotic compatibility, ensuring that the scheme recovers the classical wave equation in the vanishing-horizon limit.In addition to standard numerical analysis of the schemes, we demonstrate, through extensive numerical simulations, the accuracy and effectiveness of the proposed methods. This dissertation offers some new insights on developing advanced DG-type methods for nonlinear and nonlocal wave equations, especially in second order form.
- 일반주제명
- Applied mathematics
- 일반주제명
- Mathematics
- 일반주제명
- Applied physics
- 일반주제명
- Theoretical physics
- 기타저자
- Columbia University Applied Mathematics
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103622
■006m o d
■007cr#unu||||||||
■020 ▼a9798291542323
■035 ▼a(MiAaPQ)AAI32045755
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a519
■1001 ▼aZhou, Yin.
■24510▼aDiscontinuous Galerkin Methods for Nonlinear and Nonlocal Wave Equations
■260 ▼a[Sl]▼bColumbia University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a108 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Ren, Kui;Zhang, Lu.
■5021 ▼aThesis (Ph.D.)--Columbia University, 2025.
■520 ▼aThis dissertation develops and analyzes discontinuous Galerkin (DG) methods for two wave propagation problems: the nonlinear Schrodinger equation with wave operator (NLSW) and the nonlocal wave equation (NLW). These models arise in diverse physical and engineering contexts ranging from plasma physics to peridynamic solid mechanics, and pose significant numerical challenges due to their dispersive, nonlinear, and nonlocal behavior. Efficient numerical algorithms for these problems are essential for accurately simulating phenomena such as soliton dynamics and long-range interactions.For the NLSW model, we propose an energy-based DG formulation that preserves discrete energy properties and admits optimal convergence in the L2 norm. A key component of the method is the introduction of an auxiliary variable along with the careful design of mesh-independent numerical fluxes. We establish rigorous stability and error estimates for the semi-discrete scheme. To handle the time dimension, we employ a strong-stability-preserving Runge-Kutta (SSPRK) scheme, ensuring robust and accurate temporal integration. The method is validated through extensive numerical simulations in one and two spatial dimensions.For the NLW model, we construct and analyze a DG method that accommodates spatial nonlocality and is capable of capturing the asymptotic transition to local models. We discretize in time via a Crank-Nicolson scheme, combining second-order accuracy with favorable stability properties. The method preserves energy at the fully-discrete level and exhibits optimal convergence rates for a broad class of nonlocal kernels. We further establish asymptotic compatibility, ensuring that the scheme recovers the classical wave equation in the vanishing-horizon limit.In addition to standard numerical analysis of the schemes, we demonstrate, through extensive numerical simulations, the accuracy and effectiveness of the proposed methods. This dissertation offers some new insights on developing advanced DG-type methods for nonlinear and nonlocal wave equations, especially in second order form.
■590 ▼aSchool code: 0054.
■650 4▼aApplied mathematics
■650 4▼aMathematics
■650 4▼aApplied physics
■650 4▼aTheoretical physics
■653 ▼aDiscontinuous Galerkin
■653 ▼aFinite element method
■653 ▼aPartial differential equation
■653 ▼aNonlocal wave equation
■690 ▼a0364
■690 ▼a0405
■690 ▼a0753
■690 ▼a0215
■71020▼aColumbia University▼bApplied Mathematics.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0054
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357951▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


