Implementation of detailed chemical mechanisms into multidimensional CFD using in situ adaptive tabulation: Application to HCCI engines

M. Embouazza, Daniel Connell Haworth, N. Darabiha

Research output: Contribution to conferencePaper

21 Scopus citations

Abstract

A storage/retrieval scheme-in situ adaptive tabulation (ISAT) [1]-is used to implement detailed chemistry in a multidimensional engine CFD code. The emphasis is on predicting autoignition in nearly homogeneous and moderately non-homogeneous mixtures (HCCI); preliminary results for highly non-homogeneous direct-injection autoignition also are reported. Speedups approaching a factor of 100 have been realized with ISAT compared to direct integration of the chemical source terms; factors of five-to-ten are more readily obtainable. In the standard ISAT method, table size increases as the square of the number of chemical species in the reaction mechanism; here linear scaling is achieved by limiting the set of independent tabulation variables, while still retaining the full chemical mechanism. A key to effective use of storage/retrieval is judicious specification of the control parameters; guidelines for parameter specification are presented. With this approach, it becomes feasible to use chemical mechanisms involving over 100 species for moderately non-homogeneous systems. Further investigation is required for highly non-homogeneous systems.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 2002
EventPowertrain and Fluid Systems Conference and Exhibition - San Diego, CA, United States
Duration: Oct 21 2002Oct 24 2002

Other

OtherPowertrain and Fluid Systems Conference and Exhibition
CountryUnited States
CitySan Diego, CA
Period10/21/0210/24/02

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Implementation of detailed chemical mechanisms into multidimensional CFD using in situ adaptive tabulation: Application to HCCI engines'. Together they form a unique fingerprint.

  • Cite this

    Embouazza, M., Haworth, D. C., & Darabiha, N. (2002). Implementation of detailed chemical mechanisms into multidimensional CFD using in situ adaptive tabulation: Application to HCCI engines. Paper presented at Powertrain and Fluid Systems Conference and Exhibition, San Diego, CA, United States. https://doi.org/10.4271/2002-01-2773