Proceedings of the Korea Institute of Fire Science and Engineering Conference (한국화재소방학회:학술대회논문집)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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THERMALLY DRIVEN BUOYANCY WITHIN A HOT LAYER DUE TO SPRINKLER OPERATION

  • Nyankina, K. (Mechanical Engineering Department Victoria University of Technology) ;
  • F Turan, O. (Mechanical Engineering Department Victoria University of Technology)
  • Published : 1997.11.01
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Abstract

A two-dimensional zone-like model is developed to predict the interaction between hot gas layer and water droplets after sprinkler activation. The model combines the motion equations for each droplet with heat and mass transfer between the gas and water. The results indicate that negative buoyancy in the hot layer can only be obtained if the initial temperature profile is uniform. If an experimental profile Is used instead, positive buoyancy results. This conclusion has been confirmed with experimental data.

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