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Numerical Modeling for Mesh-independent Simulations of Spray Atomization
Numerical Modeling for Mesh-independent Simulations of Spray Atomization
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211150947
- ISBN
- 9798382839851
- DDC
- 620
- 저자명
- Han, Austin.
- 서명/저자
- Numerical Modeling for Mesh-independent Simulations of Spray Atomization
- 발행사항
- [Sl] : Cornell University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 154 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Desjardins, Olivier.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2024.
- 초록/해제
- 요약Multiphase flows involving fluid-fluid interfaces with surface tension underlie many processes of scientific and industrial importance. A major challenge associated with the numerical modeling of these flows comes from their multi-scale behavior, where coexisting drops, bubbles, and films can vary in size by several orders of magnitude, requiring computationally prohibitive mesh resolutions. Furthermore, current methods for representing fluid interfaces rely on mesh-size-dependent numerical errors to perform topology changes, such as breakup and coalescence. This dissertation presents various numerical methods to drastically increase the accuracy of large-scale interfacial flow simulations performed with relatively coarse mesh resolutions and presents several models to account for subgrid-scale interfacial physics. Focus will be directed towards applications in spray atomization, where a large liquid structure fragments into many smaller droplets.First, the accurate calculation of surface tension forces is addressed through advances in methods for the estimation of interfacial curvature. To decouple the breakup of liquid films from the underlying mesh size, a novel two-plane method for the representation of subgrid-thickness films is then discussed. Next, a modeling framework is proposed to predict the formation of small droplets from the breakup of these liquid films, including their diameters and initial velocities. Finally, the proposed framework is validated with a canonical drop breakup problem, where the models produce drop sizes and velocities in quantitative agreement with experimental results. The proposed methods will facilitate the efficient subgrid-scale modeling of spray formation for engineering applications.
- 일반주제명
- Fluid mechanics
- 일반주제명
- Computational physics
- 일반주제명
- Mechanical engineering
- 키워드
- Atomization
- 키워드
- Multiphase flow
- 키워드
- Volume of fluid
- 기타저자
- Cornell University Mechanical Engineering
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211150947
■006m o d
■007cr#unu||||||||
■020 ▼a9798382839851
■035 ▼a(MiAaPQ)AAI30992578
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620
■1001 ▼aHan, Austin.▼0(orcid)0000-0001-7186-4023
■24510▼aNumerical Modeling for Mesh-independent Simulations of Spray Atomization
■260 ▼a[Sl]▼bCornell University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a154 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Desjardins, Olivier.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2024.
■520 ▼aMultiphase flows involving fluid-fluid interfaces with surface tension underlie many processes of scientific and industrial importance. A major challenge associated with the numerical modeling of these flows comes from their multi-scale behavior, where coexisting drops, bubbles, and films can vary in size by several orders of magnitude, requiring computationally prohibitive mesh resolutions. Furthermore, current methods for representing fluid interfaces rely on mesh-size-dependent numerical errors to perform topology changes, such as breakup and coalescence. This dissertation presents various numerical methods to drastically increase the accuracy of large-scale interfacial flow simulations performed with relatively coarse mesh resolutions and presents several models to account for subgrid-scale interfacial physics. Focus will be directed towards applications in spray atomization, where a large liquid structure fragments into many smaller droplets.First, the accurate calculation of surface tension forces is addressed through advances in methods for the estimation of interfacial curvature. To decouple the breakup of liquid films from the underlying mesh size, a novel two-plane method for the representation of subgrid-thickness films is then discussed. Next, a modeling framework is proposed to predict the formation of small droplets from the breakup of these liquid films, including their diameters and initial velocities. Finally, the proposed framework is validated with a canonical drop breakup problem, where the models produce drop sizes and velocities in quantitative agreement with experimental results. The proposed methods will facilitate the efficient subgrid-scale modeling of spray formation for engineering applications.
■590 ▼aSchool code: 0058.
■650 4▼aFluid mechanics
■650 4▼aComputational physics
■650 4▼aMechanical engineering
■653 ▼aAtomization
■653 ▼aInterface reconstruction
■653 ▼aMultiphase flow
■653 ▼aNumerical methods
■653 ▼aSubgrid-scale modeling
■653 ▼aVolume of fluid
■690 ▼a0204
■690 ▼a0216
■690 ▼a0548
■71020▼aCornell University▼bMechanical Engineering.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160269▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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