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Dimensional Reduction of Adaptively Refined Nonlinear Computational Models
Dimensional Reduction of Adaptively Refined Nonlinear Computational Models
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152746
- ISBN
- 9798342113557
- DDC
- 530
- 저자명
- Little, Clayton.
- 서명/저자
- Dimensional Reduction of Adaptively Refined Nonlinear Computational Models
- 발행사항
- [Sl] : Stanford University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 134 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: A.
- 주기사항
- Advisor: Farhat, Charbel.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2024.
- 초록/해제
- 요약Adaptive mesh refinement (AMR) is fairly practiced in the context of high-dimensional, mesh-based computational models. However, it is preliminary in the context of low-dimensional, generalized-coordinate-based computational models such as projection-based reduced-order models (PROMs). This dissertation presents a complete framework for projection-based model order reduction (PMOR) of nonlinear problems in the presence of AMR that builds on elements from existing methods and augments them with critical new contributions. In particular, it proposes two algorithms for computing an inner product between spatially-adapted solution snapshots for the purpose of clustering and PMOR. The first algorithm is a semi-analytical pseudo-meshless inner product which builds on existing methods, and the second algorithm is a novel approximate method which maximizes computational efficiency. The proposed framework exploits hyperreduction---specifically, the energy-conserving sampling and weighting hyperreduction (ECSW) method---to deliver for nonlinear and/or parametric problems the desired computational gains. Most importantly, it exploits piecewise-affine approximation of the solution manifold to make the most of the notion of a supermesh, while achieving computational tractability. The performance of the proposed framework for PMOR in the presence of AMR is assessed for computational fluid dynamics (CFD) applications utilizing AMR. Its significance is demonstrated by the reported accuracies and gains in computational efficiency.
- 일반주제명
- Vortices
- 일반주제명
- Mathematical models
- 일반주제명
- Fluid dynamics
- 일반주제명
- Symmetry
- 일반주제명
- Decomposition
- 일반주제명
- Mechanics
- 일반주제명
- Dynamical systems
- 일반주제명
- Design optimization
- 일반주제명
- Physics
- 일반주제명
- Viscosity
- 일반주제명
- Turbulence models
- 일반주제명
- Digital twins
- 일반주제명
- Neural networks
- 일반주제명
- Reynolds number
- 일반주제명
- Computer engineering
- 일반주제명
- Design
- 일반주제명
- Fluid mechanics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 86-04A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152746
■006m o d
■007cr#unu||||||||
■020 ▼a9798342113557
■035 ▼a(MiAaPQ)AAI31520295
■035 ▼a(MiAaPQ)Stanfordnd246sx8551
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aLittle, Clayton.
■24510▼aDimensional Reduction of Adaptively Refined Nonlinear Computational Models
■260 ▼a[Sl]▼bStanford University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a134 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: A.
■500 ▼aAdvisor: Farhat, Charbel.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2024.
■520 ▼aAdaptive mesh refinement (AMR) is fairly practiced in the context of high-dimensional, mesh-based computational models. However, it is preliminary in the context of low-dimensional, generalized-coordinate-based computational models such as projection-based reduced-order models (PROMs). This dissertation presents a complete framework for projection-based model order reduction (PMOR) of nonlinear problems in the presence of AMR that builds on elements from existing methods and augments them with critical new contributions. In particular, it proposes two algorithms for computing an inner product between spatially-adapted solution snapshots for the purpose of clustering and PMOR. The first algorithm is a semi-analytical pseudo-meshless inner product which builds on existing methods, and the second algorithm is a novel approximate method which maximizes computational efficiency. The proposed framework exploits hyperreduction---specifically, the energy-conserving sampling and weighting hyperreduction (ECSW) method---to deliver for nonlinear and/or parametric problems the desired computational gains. Most importantly, it exploits piecewise-affine approximation of the solution manifold to make the most of the notion of a supermesh, while achieving computational tractability. The performance of the proposed framework for PMOR in the presence of AMR is assessed for computational fluid dynamics (CFD) applications utilizing AMR. Its significance is demonstrated by the reported accuracies and gains in computational efficiency.
■590 ▼aSchool code: 0212.
■650 4▼aVortices
■650 4▼aFluid-structure interaction
■650 4▼aMathematical models
■650 4▼aFluid dynamics
■650 4▼aSymmetry
■650 4▼aDecomposition
■650 4▼aMechanics
■650 4▼aDynamical systems
■650 4▼aDesign optimization
■650 4▼aPhysics
■650 4▼aPartial differential equations
■650 4▼aViscosity
■650 4▼aTurbulence models
■650 4▼aDigital twins
■650 4▼aNeural networks
■650 4▼aReynolds number
■650 4▼aComputer engineering
■650 4▼aDesign
■650 4▼aFluid mechanics
■690 ▼a0346
■690 ▼a0605
■690 ▼a0800
■690 ▼a0464
■690 ▼a0389
■690 ▼a0204
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g86-04A.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163732▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


