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MultiScale Data-Driven Modeling of Foundational Combustion Reaction Systems- [electronic resource]
MultiScale Data-Driven Modeling of Foundational Combustion Reaction Systems - [electronic ...
MultiScale Data-Driven Modeling of Foundational Combustion Reaction Systems- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214101705
ISBN  
9798380129145
DDC  
660
저자명  
LaGrotta, Carly.
서명/저자  
MultiScale Data-Driven Modeling of Foundational Combustion Reaction Systems - [electronic resource]
발행사항  
[S.l.]: : Columbia University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(307 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-02, Section: B.
주기사항  
Advisor: Burke, Michael P.
학위논문주기  
Thesis (Ph.D.)--Columbia University, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약As the world becomes increasingly interconnected, modernized, and populated, the demand for energy across the globe is growing at an unprecedented rate. This growth in energy demand has an undeniable impact on increasingly pressing social issues including, climate change, energy security, energy economy, atmospheric chemistry, and air quality. Finding a way to address these issues on a rapid timescale is more important than ever. A common thread running through all of these challenges is that they can be partially or fully addressed with the development of new chemical energy conversion technologies which, in turn, rely on a comprehensive understanding of gas phase kinetics.Examples of promising technologies include renewable fuels (i.e. methanol and hydrogen) and/or reliable, efficient, and clean engines that can accommodate renewable fuels. The development of such technology would enable the use of renewable fuels, thereby reducing emissions and cutting down on harmful byproducts released into the atmosphere. Computational simulations have become a powerful approach for developing and advancing energy technology in a safe, efficient, and effective manner. These computational approaches model reacting flows and are generally known as computational fluid dynamics (CFD). However, in order for these CFD simulations to work effectively and make meaningful predictions, the sub-models used to describe the underlying chemistry (gas phase kinetics) must be accurate; information about underlying chemistry is provided to computational simulations via a chemical kinetic model/mechanism, which describes the chemical reactions that drive the fuel oxidation within the system being simulated. Regarding combustion specifically, the reliability of predictive simulations depends on the availability of accurate data and models not only for chemical kinetics, but also thermochemistry and transport.Further complicating the problem, combustion and chemical kinetics provide a unique challenge in regard to obtaining accurate predictive models; underlying chemical kinetics mechanisms may require unprecedented accuracy to obtain truly predictive combustion modeling. For example, it has been shown in computational simulations that uncertainties in any of several kinetic parameters can yield uncertainties large enough in the physical system being modeled to cause system failure, thereby reducing the effectiveness of computational design approaches that could accelerate technology development. Hence, a strong need exists to develop a method that significantly reduces uncertainties in chemical kinetics parameters to meet the accuracy demands of advanced computational design tools. To this end, it is useful to draw on inspiration from existing methods in the field of combustion and chemical kinetics as well as tangential fields; the most compelling inspiration can be found in the field of thermochemistry in the form of the Active Thermochemical Tables (ATcT).This work presents a novel, analogous approach for chemical kinetics called MultiScale Informatics, or MSI for short. The MSI approach identifies optimized values and quantified uncertainties for a set of molecular parameters (within theoretical kinetics calculations), rate parameters, and physical model parameters (within simulations of experimental observables) as informed by data from various sources and scales. The overarching objectives of this work are to demonstrate how the MSI approach can be used to determine physically meaningful optimized kinetics parameters and quantified uncertainties, unravel webs of interconnected rate constants in complex reaction systems, resolve discrepancies among data sets, and touch on key elements of MSI's implementation.To demonstrate how these objectives are met, the MSI approach is used to explore the kinetics of three reaction sub-systems. The studies of these sub-systems will demonstrate some key elements of this approach including: the importance of raw data for quantifying the information content of experimental data, the utility of theoretical kinetics calculations for constraining experimental interpretations and providing an independent data source, and the subtleties of target data selection for avoiding unphysical parameter adjustments to match data affected by structural uncertainties.For the first sub-system explored (CH3 + HO2), the MSI approach is applied to carefully selected (mostly raw) experimental data and yields an opposite temperature dependence for the channel-specific CH3 + HO2 rate constants as compared to a previous rate-parameter optimization. While both optimization studies use the same theoretical calculations to constrain model parameters, only the present optimization, which incorporates theory directly into the model structure, yields results that are consistent with theoretical calculations.For the second sub-system explored (HO2 + HO2), the MSI approach is applied to carefully selected experimental data, leveraging the hydrogen reaction system from the first study with the addition of high level theory calculations for the reaction of HO2 + HO2. Recent high-level theoretical calculations predict a mild temperature dependence for HO2 + HO2, which is inconsistent with state-of-the-art experimental determinations that upheld the stronger temperature dependence observed in early experiments. Via MSI analysis of the theoretical and experimental data, alternative interpretations of the raw experimental data that uses HO2 + HO2 rate constants nearly identical to theoretical predictions are identified - implying that the theoretical and experimental data are actually consistent, at least when considering the raw data from experiments. Similar analyses of typical signals from low-temperature experiments indicate that an HOOOOH intermediate - identified by recent theory but absent from earlier interpretations - yields modest effects that are smaller than, but may have contributed to, the scatter in data among different experiments. More generally, the findings demonstrate that modern chemical theories and experiments have progressed to a point where meaningful comparison requires joint consideration of their data simultaneously.The third sub-system explored builds a larger web of interconnected reaction systems in an attempt to achieve data redundancy and demonstrate how interpreting coupled reaction systems is necessary to accurately determine many key rate constants. The ability of the MSI method to interpret raw experimental data and untangle rate constant reaction systems is demonstrated. The study also reinforces how implementing theory into the model structure is imperative to yield results that are consistent with experimental data as well as theoretical calculations and achieve physically realistic branching ratios.Finally, this work will present how results from all the studied reaction systems culminate into a complex hydrogen/syngas combustion model validated against data from various combustion experiments.
일반주제명  
Chemical engineering.
일반주제명  
Chemistry.
일반주제명  
Energy.
키워드  
Chemical kinetics
키워드  
Combustion
키워드  
MultiScale Informatics
기타저자  
Columbia University Mechanical Engineering
기본자료저록  
Dissertations Abstracts International. 85-02B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aLaGrotta,  Carly.
■24510▼aMultiScale  Data-Driven  Modeling  of  Foundational  Combustion  Reaction  Systems▼h[electronic  resource]
■260    ▼a[S.l.]:▼bColumbia  University.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(307  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-02,  Section:  B.
■500    ▼aAdvisor:  Burke,  Michael  P.
■5021  ▼aThesis  (Ph.D.)--Columbia  University,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aAs  the  world  becomes  increasingly  interconnected,  modernized,  and  populated,  the  demand  for  energy  across  the  globe  is  growing  at  an  unprecedented  rate.  This  growth  in  energy  demand  has  an  undeniable  impact  on  increasingly  pressing  social  issues  including,  climate  change,  energy  security,  energy  economy,  atmospheric  chemistry,  and  air  quality.  Finding  a  way  to  address  these  issues  on  a  rapid  timescale  is  more  important  than  ever.  A  common  thread  running  through  all  of  these  challenges  is  that  they  can  be  partially  or  fully  addressed  with  the  development  of  new  chemical  energy  conversion  technologies  which,  in  turn,  rely  on  a  comprehensive  understanding  of  gas  phase  kinetics.Examples  of  promising  technologies  include  renewable  fuels  (i.e.  methanol  and  hydrogen)  and/or  reliable,  efficient,  and  clean  engines  that  can  accommodate  renewable  fuels.  The  development  of  such  technology  would  enable  the  use  of  renewable  fuels,  thereby  reducing  emissions  and  cutting  down  on  harmful  byproducts  released  into  the  atmosphere.  Computational  simulations  have  become  a  powerful  approach  for  developing  and  advancing  energy  technology  in  a  safe,  efficient,  and  effective  manner.  These  computational  approaches  model  reacting  flows  and  are  generally  known  as  computational  fluid  dynamics  (CFD).  However,  in  order  for  these  CFD  simulations  to  work  effectively  and  make  meaningful  predictions,  the  sub-models  used  to  describe  the  underlying  chemistry  (gas  phase  kinetics)  must  be  accurate;  information  about  underlying  chemistry  is  provided  to  computational  simulations  via  a  chemical  kinetic  model/mechanism,  which  describes  the  chemical  reactions  that  drive  the  fuel  oxidation  within  the  system  being  simulated.  Regarding  combustion  specifically,  the  reliability  of  predictive  simulations  depends  on  the  availability  of  accurate  data  and  models  not  only  for  chemical  kinetics,  but  also  thermochemistry  and  transport.Further  complicating  the  problem,  combustion  and  chemical  kinetics  provide  a  unique  challenge  in  regard  to  obtaining  accurate  predictive  models;  underlying  chemical  kinetics  mechanisms  may  require  unprecedented  accuracy  to  obtain  truly  predictive  combustion  modeling.  For  example,  it  has  been  shown  in  computational  simulations  that  uncertainties  in  any  of  several  kinetic  parameters  can  yield  uncertainties  large  enough  in  the  physical  system  being  modeled  to  cause  system  failure,  thereby  reducing  the  effectiveness  of  computational  design  approaches  that  could  accelerate  technology  development.  Hence,  a  strong  need  exists  to  develop  a  method  that  significantly  reduces  uncertainties  in  chemical  kinetics  parameters  to  meet  the  accuracy  demands  of  advanced  computational  design  tools.  To  this  end,  it  is  useful  to  draw  on  inspiration  from  existing  methods  in  the  field  of  combustion  and  chemical  kinetics  as  well  as  tangential  fields;  the  most  compelling  inspiration  can  be  found  in  the  field  of  thermochemistry  in  the  form  of  the  Active  Thermochemical  Tables  (ATcT).This  work  presents  a  novel,  analogous  approach  for  chemical  kinetics  called  MultiScale  Informatics,  or  MSI  for  short.  The  MSI  approach  identifies  optimized  values  and  quantified  uncertainties  for  a  set  of  molecular  parameters  (within  theoretical  kinetics  calculations),  rate  parameters,  and  physical  model  parameters  (within  simulations  of  experimental  observables)  as  informed  by  data  from  various  sources  and  scales.  The  overarching  objectives  of  this  work  are  to  demonstrate  how  the  MSI  approach  can  be  used  to  determine  physically  meaningful  optimized  kinetics  parameters  and  quantified  uncertainties,  unravel  webs  of  interconnected  rate  constants  in  complex  reaction  systems,  resolve  discrepancies  among  data  sets,  and  touch  on  key  elements  of  MSI's  implementation.To  demonstrate  how  these  objectives  are  met,  the  MSI  approach  is  used  to  explore  the  kinetics  of  three  reaction  sub-systems.  The  studies  of  these  sub-systems  will  demonstrate  some  key  elements  of  this  approach  including:  the  importance  of  raw  data  for  quantifying  the  information  content  of  experimental  data,  the  utility  of  theoretical  kinetics  calculations  for  constraining  experimental  interpretations  and  providing  an  independent  data  source,  and  the  subtleties  of  target  data  selection  for  avoiding  unphysical  parameter  adjustments  to  match  data  affected  by  structural  uncertainties.For  the  first  sub-system  explored  (CH3  +  HO2),  the  MSI  approach  is  applied  to  carefully  selected  (mostly  raw)  experimental  data  and  yields  an  opposite  temperature  dependence  for  the  channel-specific  CH3  +  HO2  rate  constants  as  compared  to  a  previous  rate-parameter  optimization.  While  both  optimization  studies  use  the  same  theoretical  calculations  to  constrain  model  parameters,  only  the  present  optimization,  which  incorporates  theory  directly  into  the  model  structure,  yields  results  that  are  consistent  with  theoretical  calculations.For  the  second  sub-system  explored  (HO2  +  HO2),  the  MSI  approach  is  applied  to  carefully  selected  experimental  data,  leveraging  the  hydrogen  reaction  system  from  the  first  study  with  the  addition  of  high  level  theory  calculations  for  the  reaction  of  HO2  +  HO2.  Recent  high-level  theoretical  calculations  predict  a  mild  temperature  dependence  for  HO2  +  HO2,  which  is  inconsistent  with  state-of-the-art  experimental  determinations  that  upheld  the  stronger  temperature  dependence  observed  in  early  experiments.  Via  MSI  analysis  of  the  theoretical  and  experimental  data,  alternative  interpretations  of  the  raw  experimental  data  that  uses  HO2  +  HO2  rate  constants  nearly  identical  to  theoretical  predictions  are  identified  -  implying  that  the  theoretical  and  experimental  data  are  actually  consistent,  at  least  when  considering  the  raw  data  from  experiments.  Similar  analyses  of  typical  signals  from  low-temperature  experiments  indicate  that  an  HOOOOH  intermediate  -  identified  by  recent  theory  but  absent  from  earlier  interpretations  -  yields  modest  effects  that  are  smaller  than,  but  may  have  contributed  to,  the  scatter  in  data  among  different  experiments.  More  generally,  the  findings  demonstrate  that  modern  chemical  theories  and  experiments  have  progressed  to  a  point  where  meaningful  comparison  requires  joint  consideration  of  their  data  simultaneously.The  third  sub-system  explored  builds  a  larger  web  of  interconnected  reaction  systems  in  an  attempt  to  achieve  data  redundancy  and  demonstrate  how  interpreting  coupled  reaction  systems  is  necessary  to  accurately  determine  many  key  rate  constants.  The  ability  of  the  MSI  method  to  interpret  raw  experimental  data  and  untangle  rate  constant  reaction  systems  is  demonstrated.  The  study  also  reinforces  how  implementing  theory  into  the  model  structure  is  imperative  to  yield  results  that  are  consistent  with  experimental  data  as  well  as  theoretical  calculations  and  achieve  physically  realistic  branching  ratios.Finally,  this  work  will  present  how  results  from  all  the  studied  reaction  systems  culminate  into  a  complex  hydrogen/syngas  combustion  model  validated  against  data  from  various  combustion  experiments.
■590    ▼aSchool  code:  0054.
■650  4▼aChemical  engineering.
■650  4▼aChemistry.
■650  4▼aEnergy.
■653    ▼aChemical  kinetics
■653    ▼aCombustion
■653    ▼aMultiScale  Informatics
■690    ▼a0542
■690    ▼a0485
■690    ▼a0791
■71020▼aColumbia  University▼bMechanical  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g85-02B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0054
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16934866▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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