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Advances in Volume Penalization Methods for Simulating Multiphase Fluid-Structure Interaction and Phase-Change Phenomena
Advances in Volume Penalization Methods for Simulating Multiphase Fluid-Structure Interaction and Phase-Change Phenomena
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151327
- ISBN
- 9798383087381
- DDC
- 621
- 서명/저자
- Advances in Volume Penalization Methods for Simulating Multiphase Fluid-Structure Interaction and Phase-Change Phenomena
- 발행사항
- [Sl] : University of California, San Diego, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 259 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Bhalla, Amneet Pal Singh;Saintillan, David.
- 학위논문주기
- Thesis (Ph.D.)--University of California, San Diego, 2024.
- 초록/해제
- 요약The volume penalization method (VP), a type of Fictitious Domain Method, is a widely used technique for solving partial differential equations (PDEs) in complex domains. Its applications span various fields, from fluid-structure interactions like wave energy converters, bird and insect flight, fish swimming, and cardiovascular flows, to phase change applications such as glacier melting and additive manufacturing processes. This thesis presents robust and adaptive VP techniques for simulating non-isothermal phase-changing flows, as well as isothermal multiphase fluid-structure interaction problems. Using the numerically constructed flux-forcing functions for arbitrarily complex boundaries, we extend the flux-based volume penalization (VP) method to handle more general boundary conditions, including spatially varying inhomogeneous Neumann and Robin boundary conditions. Several two- and three-dimensional test examples, including flux-driven thermal convection in a concentric annular domain, are considered to assess the spatial accuracy of the numerical solutions. In addition, we propose a projection method-based preconditioning strategy for solving VP incompressible and low-Mach Navier-Stokes equations. The solver converges faster as the penalty coefficient decreases, contrary to prior experience. The developed preconditioning strategy is used in a novel low Mach enthalpy method to solve solidification and melting problems with variable thermophysical properties, including density. The proposed method captures the density change-induced flow during phase change material (PCM) melting and solidification. A gas phase is also incorporated and coupled to the solid-liquid PCM region in this formulation. The new low Mach enthalpy method is validated against analytical solutions for a PCM undergoing a large density change during its phase transition. Furthermore, we propose a set of simple sanity checks to serve as benchmarks for evaluating computational fluid dynamics (CFD) algorithms that aim to capture the volume change effects of PCMs. Adaptive mesh refinement is employed to achieve fine grid resolution in domains requiring more accuracy, such as PCM-gas and liquid-solid interfaces.
- 일반주제명
- Mechanical engineering
- 일반주제명
- Computational physics
- 일반주제명
- Fluid mechanics
- 일반주제명
- Aerospace engineering
- 키워드
- Linear solvers
- 기타저자
- University of California, San Diego Mechanical and Aerospace Engineering (Joint Doctoral with SDSU)
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798383087381
■035 ▼a(MiAaPQ)AAI31240278
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a621
■1001 ▼aThirumalaisamy, Ramakrishnan.
■24510▼aAdvances in Volume Penalization Methods for Simulating Multiphase Fluid-Structure Interaction and Phase-Change Phenomena
■260 ▼a[Sl]▼bUniversity of California, San Diego▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a259 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Bhalla, Amneet Pal Singh;Saintillan, David.
■5021 ▼aThesis (Ph.D.)--University of California, San Diego, 2024.
■520 ▼aThe volume penalization method (VP), a type of Fictitious Domain Method, is a widely used technique for solving partial differential equations (PDEs) in complex domains. Its applications span various fields, from fluid-structure interactions like wave energy converters, bird and insect flight, fish swimming, and cardiovascular flows, to phase change applications such as glacier melting and additive manufacturing processes. This thesis presents robust and adaptive VP techniques for simulating non-isothermal phase-changing flows, as well as isothermal multiphase fluid-structure interaction problems. Using the numerically constructed flux-forcing functions for arbitrarily complex boundaries, we extend the flux-based volume penalization (VP) method to handle more general boundary conditions, including spatially varying inhomogeneous Neumann and Robin boundary conditions. Several two- and three-dimensional test examples, including flux-driven thermal convection in a concentric annular domain, are considered to assess the spatial accuracy of the numerical solutions. In addition, we propose a projection method-based preconditioning strategy for solving VP incompressible and low-Mach Navier-Stokes equations. The solver converges faster as the penalty coefficient decreases, contrary to prior experience. The developed preconditioning strategy is used in a novel low Mach enthalpy method to solve solidification and melting problems with variable thermophysical properties, including density. The proposed method captures the density change-induced flow during phase change material (PCM) melting and solidification. A gas phase is also incorporated and coupled to the solid-liquid PCM region in this formulation. The new low Mach enthalpy method is validated against analytical solutions for a PCM undergoing a large density change during its phase transition. Furthermore, we propose a set of simple sanity checks to serve as benchmarks for evaluating computational fluid dynamics (CFD) algorithms that aim to capture the volume change effects of PCMs. Adaptive mesh refinement is employed to achieve fine grid resolution in domains requiring more accuracy, such as PCM-gas and liquid-solid interfaces.
■590 ▼aSchool code: 0033.
■650 4▼aMechanical engineering
■650 4▼aComputational physics
■650 4▼aFluid mechanics
■650 4▼aAerospace engineering
■653 ▼aFluid-structure interaction
■653 ▼aLinear solvers
■653 ▼aNon-isothermal multiphase flows
■653 ▼aPhase change material
■653 ▼aVolume penalization method
■690 ▼a0548
■690 ▼a0216
■690 ▼a0204
■690 ▼a0538
■71020▼aUniversity of California, San Diego▼bMechanical and Aerospace Engineering (Joint Doctoral with SDSU).
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0033
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161227▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
