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Physics-Informed and Data-Driven Modeling for Radiative Transport in Particulate Media
Physics-Informed and Data-Driven Modeling for Radiative Transport in Particulate Media
Physics-Informed and Data-Driven Modeling for Radiative Transport in Particulate Media

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105214
ISBN  
9798291565360
DDC  
620
저자명  
Chen, Zijie.
서명/저자  
Physics-Informed and Data-Driven Modeling for Radiative Transport in Particulate Media
발행사항  
[Sl] : University of Michigan, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
186 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Bala Chandran, Rohini.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
초록/해제  
요약Radiative transport in particulate media plays a crucial role in many applications ranging from high-temperature ( 600 °C) solar energy and thermal technologies to spectrally selective materials for heating/cooling applications. However, modeling methods for radiative transport in particulate media have focused on static media such as packed beds and foams, and there has been limited focus on extending it to granular flows. Therefore, the main objective of this dissertation is to combine physics-informed modeling with data-driven techniques to integrate radiative transport predictions in dynamic, multiphase flows involving solid particles.To enable the coupling of radiative transport with particle flows, reduced-order radiative view factor correlations are developed, where the view factor is determined as a function of dimensionless distance, viewing angle, and number of shading particles. Training data is obtained from physics-based Monte Carlo ray tracing simulations on a monodisperse, packed bed with a wide range of solid volume fractions (0.016-0.45). These correlations are physically interpretable and result in accurate predictions. They are powerful as they help obtain particle-particle and particle-wall view factors as a function of only geometric parameters, which facilitates the determination of radiative fluxes on discrete surfaces. This is integrated with particle flow models that perform Lagrangian tracking to update individual particle position, velocity, and temperature. Leveraging open-source software, our model incorporates short-range and long-range radiative interactions between grey surfaces in addition to conductive heat transfer pathways. These coupled models are applied to: (i) systematically test the effect of solid volume fractions in a plug flow of particles; and (ii) perform extensive parametric explorations to inform new and comprehensive heat transfer correlations for dense granular flows with applications in particle-based heat exchangers. These discrete flow simulations reveal that radiation is extremely sensitive to solid volume fraction as it contributes 90% for dilute flows. Our correlation notably captures the effects of particle size, thermal conductivity and solid volume fraction while existing correlations from continuum modeling and/or experiments either focus on channel geometry or cannot obtain good effective properties for discrete flow. This correlation matches well with reported experimental data and offers a versatile, rapid predictive tool to develop strategies to improve thermal performance. For instance, by shrinking the particle size by about two-thirds, the heat transfer coefficient can be enhanced from 300 to 400 W/m.
초록/해제  
요약2/K.Inverse design tools have been developed to identify new potential optical properties for target spectral performance. Assuming a packed bed of particles, synthetic training datasets that map reflectance as a function of wavelength (0.2-14 μm), material morphology (particle size and solid volume fraction) and refractive indices are generated using classical electromagnetic wave and ray tracing simulations. To facilitate rapid predictions of spectral reflectance and extensive parametric explorations, a decision tree forward model is developed, which achieves high accuracy at low computational cost. Inverse model is constructed by integrating particle swarm optimization and decision tree model while offering multiple possible solutions of complex refractive index for the same target. This inverse model has been proven to provide non-uniqueness and non-linearity mapping from spectral reflectance to optical properties by an ideal radiative cooling profile, and this can be broadly applied to other spectral designs as well.In summary, this dissertation develops powerful radiative transport modeling tools for particulate media by combining high-fidelity physics-based simulations with interpretable data-driven techniques while striving to balance accuracy and computational efficiency.
일반주제명  
Engineering
일반주제명  
Energy
일반주제명  
Mechanical engineering
일반주제명  
Materials science
키워드  
Radiative transport
키워드  
Particulate media
키워드  
Data-driven modeling
키워드  
Tracing simulations
키워드  
Radiative fluxes
기타저자  
University of Michigan Mechanical Engineering
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aChen,  Zijie.
■24510▼aPhysics-Informed  and  Data-Driven  Modeling  for  Radiative  Transport  in  Particulate  Media
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a186  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Bala  Chandran,  Rohini.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aRadiative  transport  in  particulate  media  plays  a  crucial  role  in  many  applications  ranging  from  high-temperature  (  600  °C)  solar  energy  and  thermal  technologies  to  spectrally  selective  materials  for  heating/cooling  applications.  However,  modeling  methods  for  radiative  transport  in  particulate  media  have  focused  on  static  media  such  as  packed  beds  and  foams,  and  there  has  been  limited  focus  on  extending  it  to  granular  flows.  Therefore,  the  main  objective  of  this  dissertation  is  to  combine  physics-informed  modeling  with  data-driven  techniques  to  integrate  radiative  transport  predictions  in  dynamic,  multiphase  flows  involving  solid  particles.To  enable  the  coupling  of  radiative  transport  with  particle  flows,  reduced-order  radiative  view  factor  correlations  are  developed,  where  the  view  factor  is  determined  as  a  function  of  dimensionless  distance,  viewing  angle,  and  number  of  shading  particles.  Training  data  is  obtained  from  physics-based  Monte  Carlo  ray  tracing  simulations  on  a  monodisperse,  packed  bed  with  a  wide  range  of  solid  volume  fractions  (0.016-0.45).  These  correlations  are  physically  interpretable  and  result  in  accurate  predictions.  They  are  powerful  as  they  help  obtain  particle-particle  and  particle-wall  view  factors  as  a  function  of  only  geometric  parameters,  which  facilitates  the  determination  of  radiative  fluxes  on  discrete  surfaces.  This  is  integrated  with  particle  flow  models  that  perform  Lagrangian  tracking  to  update  individual  particle  position,  velocity,  and  temperature.  Leveraging  open-source  software,  our  model  incorporates  short-range  and  long-range  radiative  interactions  between  grey  surfaces  in  addition  to  conductive  heat  transfer  pathways.  These  coupled  models  are  applied  to:  (i)  systematically  test  the  effect  of  solid  volume  fractions  in  a  plug  flow  of  particles;  and  (ii)  perform  extensive  parametric  explorations  to  inform  new  and  comprehensive  heat  transfer  correlations  for  dense  granular  flows  with  applications  in  particle-based  heat  exchangers.  These  discrete  flow  simulations  reveal  that  radiation  is  extremely  sensitive  to  solid  volume  fraction  as  it  contributes  90%  for  dilute  flows.  Our  correlation  notably  captures  the  effects  of  particle  size,  thermal  conductivity  and  solid  volume  fraction  while  existing  correlations  from  continuum  modeling  and/or  experiments  either  focus  on  channel  geometry  or  cannot  obtain  good  effective  properties  for  discrete  flow.  This  correlation  matches  well  with  reported  experimental  data  and  offers  a  versatile,  rapid  predictive  tool  to  develop  strategies  to  improve  thermal  performance.  For  instance,  by  shrinking  the  particle  size  by  about  two-thirds,  the  heat  transfer  coefficient  can  be  enhanced  from  300  to  400  W/m.
■520    ▼a2/K.Inverse  design  tools  have  been  developed  to  identify  new  potential  optical  properties  for  target  spectral  performance.  Assuming  a  packed  bed  of  particles,  synthetic  training  datasets  that  map  reflectance  as  a  function  of  wavelength  (0.2-14  μm),  material  morphology  (particle  size  and  solid  volume  fraction)  and  refractive  indices  are  generated  using  classical  electromagnetic  wave  and  ray  tracing  simulations.  To  facilitate  rapid  predictions  of  spectral  reflectance  and  extensive  parametric  explorations,  a  decision  tree  forward  model  is  developed,  which  achieves  high  accuracy  at  low  computational  cost.  Inverse  model  is  constructed  by  integrating  particle  swarm  optimization  and  decision  tree  model  while  offering  multiple  possible  solutions  of  complex  refractive  index  for  the  same  target.  This  inverse  model  has  been  proven  to  provide  non-uniqueness  and  non-linearity  mapping  from  spectral  reflectance  to  optical  properties  by  an  ideal  radiative  cooling  profile,  and  this  can  be  broadly  applied  to  other  spectral  designs  as  well.In  summary,  this  dissertation  develops  powerful  radiative  transport  modeling  tools  for  particulate  media  by  combining  high-fidelity  physics-based  simulations  with  interpretable  data-driven  techniques  while  striving  to  balance  accuracy  and  computational  efficiency.
■590    ▼aSchool  code:  0127.
■650  4▼aEngineering
■650  4▼aEnergy
■650  4▼aMechanical  engineering
■650  4▼aMaterials  science
■653    ▼aRadiative  transport
■653    ▼aParticulate  media
■653    ▼aData-driven  modeling
■653    ▼aTracing  simulations
■653    ▼aRadiative  fluxes
■690    ▼a0548
■690    ▼a0791
■690    ▼a0537
■690    ▼a0794
■71020▼aUniversity  of  Michigan▼bMechanical  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359791▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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