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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v36.i7.40
pages 573-584

Numerical Modeling of Compartment Fires

A. P. Zykov
Institute of Problems of Mechanics, Russian Academy of Sciences, Moscow, Russian Federation
S. E. Yakush
Institute of Problems of Mechanics, Russian Academy of Sciences, Moscow, Russian Federation

ABSTRAKT

A three-dimensional computer code FIRE3D for modeling heat and mass transfer in case of fire in a compartment with openings has been developed. The k−ε turbulence model and the model for disintegration of vortexes for turbulent combustion are used. Numerical solution of the system of gas mixture equations is based on the implicit method SIMPLE. The differential equations of transfer are solved in an orthogonal nonuniform staggered grid by a method of three-dimensional factorization: the equation of pressure adjustment is solved by the multigrid iteration method. The code FIRE3D has been verified against experimental data (Steckler et al., 1982). Development of a buoyant jet, its uplift and spreading over the ceiling, and formation of a hot area, exchanging mass and heat with the outside space through the doorway, have been obtained. In the calculations, the power of the source was changed; the time dependences of mass rates of flows incoming and outgoing through the opening as well as the characteristics of temperature stratification (the height of the interface, the average temperature in the upper and lower zones of stratification) have been determined. The calculation results are in satisfactory agreement with the experimental data.


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