On the development of a subgrid CFD model for fire extinguishment Metadata

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Title

  • Main Title On the development of a subgrid CFD model for fire extinguishment

Creator

  • Author: TIESZEN,SHELDON R.
    Creator Type: Personal
  • Author: LOPEZ,AMALIA R.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: US Department of Energy (United States)

Publisher

  • Name: Sandia National Laboratories
    Place of Publication: Albuquerque, New Mexico
    Additional Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)

Date

  • Creation: 2000-02-02

Language

  • English

Description

  • Content Description: A subgrid model is presented for use in CFD fire simulations to account for thermal suppressants and strain. The extinguishment criteria is based on the ratio of a local fluid-mechanics time-scale to a local chemical time-scale compared to an empirically-determined critical Damkohler number. Local extinction occurs if this time scale is exceeded, global fire extinguishment occurs when local extinction has occurred for all combusting cells. The fluid mechanics time scale is based on the Kolmogorov time scale and the chemical time scale is based on blowout of a perfectly stirred reactor. The input to the reactor is based on cell averaged temperatures, assumed stoichiometric fuel/air composition, and cell averaged suppressant concentrations including combustion products. A detailed chemical mechanism is employed. The chemical time-scale is precalculated and mixing rules are used to reduce the composition space that must be parameterized. Comparisons with experimental data for fire extinguishment in a flame-stabilizing, backward-facing step geometry indicates that the model is conservative for this condition.
  • Physical Description: 22 p.

Subject

  • Keyword: Fluid Mechanics
  • Keyword: Fire Extinguishers
  • STI Subject Categories: 37 Inorganic, Organic, Physical And Analytical Chemistry
  • Keyword: Mathematical Models
  • Keyword: Fires
  • Keyword: Inhibition
  • Keyword: Combustion Kinetics

Source

  • Conference: 28th Symposium (International) on Combustion, Edinburgh, Scotland (GB), 06/30/2000--07/05/2000

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: SAND2000-0321C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 751174
  • Archival Resource Key: ark:/67531/metadc711768

Note

  • Display Note: OSTI as DE00751174
  • Display Note: Medium: P; Size: 22 pages