Scaling laws for modeling mass fires
Document Type: Journal Article
Author(s): G. M. Byram
Publication Year: 1966

Cataloging Information

  • combustion
  • fire intensity
  • fire size
  • flame length
  • laboratory fires
  • statistical analysis
  • temperature
  • wind
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 33584
Tall Timbers Record Number: 7749
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

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The effective use of modeling techniques in the study of free-burning fires requires more knowledge of the essential scaling laws than has hitherto been available. These laws are developed for a stationary area or 'mass' fire by the methods of dimensional analysis. If fires are burning in calm air, geometric similarity is determined by only one dimensionless group which may be defined as a buoyancy number. For fires burning in a wind stream, geometric similarity is determined by two dimensionless groups - a buoyancy number and a Froude number. Additional groups from the dimensional analysis show how variables such as lengths, times, accelerations, and temperatures scale. A hypothetical model fire, based partly on estimates and partly on observations of laboratory fires, illustrates how a relatively simple model could be used to predict the characteristics of a large stationary mass fire.

Byram, G. M. 1966. Scaling laws for modeling mass fires. Pyrodynamics, v. 4, p. 271-284.