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Discontinuous Galerkin Methods for Nonlinear and Nonlocal Wave Equations
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
키워드  
Discontinuous Galerkin
키워드  
Finite element method
키워드  
Partial differential equation
키워드  
Nonlocal wave equation
기타저자  
Columbia University Applied Mathematics
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
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MARC

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■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.

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