NUMERICAL SIMULATION OF FIRE PLUME-INDUCED CEILING JETS USING THE STANDARD k-ε MODEL

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  • 火災プルームによる天井ジェットの標準k-εモデルに基づく数値予測
  • カサイ プルーム ニ ヨル テンジョウ ジェット ノ ヒョウジュン k イプシロン モデル ニ モトヅク スウチ ヨソク

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Abstract

The main objective of the present work is an investigation of the accuracy and the reliability of numerical predictions on ceiling jets induced by fire plumes for the practical application in fire-safety planning. Phenomena of ceiling jets are studied numerically using the standard k-ε model of turbulence. Computed results are compared with basic experimental data. Of particular interest is the dependency of (a) the computational mesh system, (b) the incompressible or compressible flow assumptions, and (c) initial values of k and ε at the inflow on the ceiling jet solutions. The entrainment rate computed for ceiling jets is compared with computed results for vertical plumes, fulfilling the continuity in the flow rate near the point of transition.

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