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Videc-cfd: A Methodology for Variational Integration of a Discrete Exterior Calculus-based Computational Fluid Dynamics Formulation
Videc-cfd: A Methodology for Variational Integration of a Discrete Exterior Calculus-based Computational Fluid Dynamics Formulation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105827
- ISBN
- 9798263343651
- DDC
- 629.13
- 서명/저자
- Videc-cfd: A Methodology for Variational Integration of a Discrete Exterior Calculus-based Computational Fluid Dynamics Formulation
- 발행사항
- [Sl] : Georgia Institute of Technology, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 495 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
- 주기사항
- Advisor: Mavris, Dimitri.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
- 초록/해제
- 요약The following dissertation contains research related to a new formulation for Computational Fluid Dynamics for modeling unsteady, turbulent, compressible flows in conceptual design. The formulation is based on techniques from discrete differential geometry, discrete exterior calculus, Lie algebra, algebraic topology, and discrete variational integration and their applications in computational mechanics. The language of discrete differential forms enabled an invariant preserving discretization of the governing equations on a discrete spatial domain. Stokes' Theorem, among others, are only conserved in the limit of an infinitely refined mesh, a converged solution, and/or on average in conventional methodologies but are exactly preserved in this formulation. Lie algebra and algebraic topology formed a bridge between abstract and applied concepts of geometric analysis and partial differential equations on a manifold. Finally, discrete variational integration enabled exact preservation of energy, angular momentum, and other fundamental invariants in discretized space-time.The motivation for this project had multiple sources. The initial motivation came from a fuel slosh project the author was assigned while working as an intern at NASA Goddard Space Flight Center. The goal was to create a higher fidelity fuel slosh model than the standard pendulum-based mechanical models with minimal sacrifice in model runtime. The idea was based on papers by Stam who developed rapid, unconditionally stable fluid models for graphic design. Further papers by Elcott, Marsden, Mullen, and many others expanded on those ideas for accurately capturing the underlying physics of incompressible flows. These papers cited earlier works by Tonti, Truesdell, and others that were instrumental in further development of this dissertation's methodology.Another source of motivation stemmed from the author's experience using CFD on research projects as a graduate research assistant, literature searches, discussions with experts at conferences and research sponsor meetings, class projects, and team design projects while in school. CFD is a useful design tool but not without drawbacks. Turbulent flows, complex geometries, and multi-physics problems are difficult to model. Such problems require copious amounts of computational resources, wall time, and experts for problem setup and results interpretation. Further, results from models can be inconsistent and/or model dependent. For example, the same flow over an airfoil at a high angle of attack may have different results based on the turbulence model used, the choice of initial conditions, and/or the numerical integration scheme.The final source of motivation came from the author's research into hypersonic vehicle simulation, flight testing, and design. The initial research interest and goal was related to uncertainty quantification regarding this process. The non-linearity of hypersonic modeling, the intense interdisciplinary coupling, and the inherent integrated nature of air-breathing hypersonic vehicles create vast amounts of uncertainty about a designed vehicle's final performance.These motivations led to a deeper literature search into simulating compressible turbulent flows, computational mechanics, aerodynamic coupling with other disciplines, and the use of CFD in engineering design. Many methods exist for turbulent CFD. The problem is that few have shown promise in resolving the fundamental problems mentioned previously for a wide range of applications. Further, the ones that show promise have focused primarily on the novelty of the method, are useful for a narrow range of application, and/or require extensive computational resources. Novelty alone is not enough. New methodologies and codes must be capable of resolving fundamental problems with CFD and answering questions related to phenomena pertinent to industry problems over a wide range of possible flow conditions.
- 일반주제명
- Aeronautics
- 일반주제명
- Calculus
- 일반주제명
- Thermodynamics
- 일반주제명
- Fluid dynamics
- 일반주제명
- Computer peripherals
- 일반주제명
- Symmetry
- 일반주제명
- Mathematics
- 일반주제명
- Energy
- 일반주제명
- Algebra
- 일반주제명
- Vehicles
- 일반주제명
- Aircraft
- 일반주제명
- Physics
- 일반주제명
- Viscosity
- 일반주제명
- Aerodynamics
- 일반주제명
- Design
- 일반주제명
- Reynolds number
- 일반주제명
- Geometry
- 일반주제명
- Aerospace engineering
- 일반주제명
- Computer science
- 일반주제명
- Fluid mechanics
- 일반주제명
- Transportation
- 기본자료저록
- Dissertations Abstracts International. 87-05A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798263343651
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■035 ▼a(MiAaPQ)GeorgiaTech76931
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■0820 ▼a629.13
■1001 ▼aLeibenguth, Chase Michael.
■24510▼aVidec-cfd: A Methodology for Variational Integration of a Discrete Exterior Calculus-based Computational Fluid Dynamics Formulation
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a495 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: A.
■500 ▼aAdvisor: Mavris, Dimitri.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2024.
■520 ▼aThe following dissertation contains research related to a new formulation for Computational Fluid Dynamics for modeling unsteady, turbulent, compressible flows in conceptual design. The formulation is based on techniques from discrete differential geometry, discrete exterior calculus, Lie algebra, algebraic topology, and discrete variational integration and their applications in computational mechanics. The language of discrete differential forms enabled an invariant preserving discretization of the governing equations on a discrete spatial domain. Stokes' Theorem, among others, are only conserved in the limit of an infinitely refined mesh, a converged solution, and/or on average in conventional methodologies but are exactly preserved in this formulation. Lie algebra and algebraic topology formed a bridge between abstract and applied concepts of geometric analysis and partial differential equations on a manifold. Finally, discrete variational integration enabled exact preservation of energy, angular momentum, and other fundamental invariants in discretized space-time.The motivation for this project had multiple sources. The initial motivation came from a fuel slosh project the author was assigned while working as an intern at NASA Goddard Space Flight Center. The goal was to create a higher fidelity fuel slosh model than the standard pendulum-based mechanical models with minimal sacrifice in model runtime. The idea was based on papers by Stam who developed rapid, unconditionally stable fluid models for graphic design. Further papers by Elcott, Marsden, Mullen, and many others expanded on those ideas for accurately capturing the underlying physics of incompressible flows. These papers cited earlier works by Tonti, Truesdell, and others that were instrumental in further development of this dissertation's methodology.Another source of motivation stemmed from the author's experience using CFD on research projects as a graduate research assistant, literature searches, discussions with experts at conferences and research sponsor meetings, class projects, and team design projects while in school. CFD is a useful design tool but not without drawbacks. Turbulent flows, complex geometries, and multi-physics problems are difficult to model. Such problems require copious amounts of computational resources, wall time, and experts for problem setup and results interpretation. Further, results from models can be inconsistent and/or model dependent. For example, the same flow over an airfoil at a high angle of attack may have different results based on the turbulence model used, the choice of initial conditions, and/or the numerical integration scheme.The final source of motivation came from the author's research into hypersonic vehicle simulation, flight testing, and design. The initial research interest and goal was related to uncertainty quantification regarding this process. The non-linearity of hypersonic modeling, the intense interdisciplinary coupling, and the inherent integrated nature of air-breathing hypersonic vehicles create vast amounts of uncertainty about a designed vehicle's final performance.These motivations led to a deeper literature search into simulating compressible turbulent flows, computational mechanics, aerodynamic coupling with other disciplines, and the use of CFD in engineering design. Many methods exist for turbulent CFD. The problem is that few have shown promise in resolving the fundamental problems mentioned previously for a wide range of applications. Further, the ones that show promise have focused primarily on the novelty of the method, are useful for a narrow range of application, and/or require extensive computational resources. Novelty alone is not enough. New methodologies and codes must be capable of resolving fundamental problems with CFD and answering questions related to phenomena pertinent to industry problems over a wide range of possible flow conditions.
■590 ▼aSchool code: 0078.
■650 4▼aAeronautics
■650 4▼aCalculus
■650 4▼aThermodynamics
■650 4▼aFluid dynamics
■650 4▼aComputer peripherals
■650 4▼aSymmetry
■650 4▼aMathematics
■650 4▼aEnergy
■650 4▼aAlgebra
■650 4▼aVehicles
■650 4▼aAircraft
■650 4▼aPhysics
■650 4▼aPartial differential equations
■650 4▼aViscosity
■650 4▼aAerodynamics
■650 4▼aDesign
■650 4▼aReynolds number
■650 4▼aGeometry
■650 4▼aAerospace engineering
■650 4▼aComputer science
■650 4▼aFluid mechanics
■650 4▼aTransportation
■690 ▼a0791
■690 ▼a0389
■690 ▼a0405
■690 ▼a0348
■690 ▼a0605
■690 ▼a0538
■690 ▼a0984
■690 ▼a0204
■690 ▼a0709
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05A.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361288▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


