A Numerical Study of Smoke Movement In Atrium Space

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Journal of Korean Institute of Fire Science and Engineering 1997;11(4):3-14.
Published online December 31, 1997.

아트리움 공간에 있어서 연기 유동에 관한 수치해석적 연구

노재성유홍선정연태김충익윤명오

¹중앙대학교 기계공학과²중앙대학교 기계공학과³중앙대학교 기계공학과⁴중앙대학교 기계공학과⁵서울시립대학교 기계설계학과, 학술이사

A Numerical Study of Smoke Movement In Atrium Space

Abstract

The smoke filling process for the atrium space containing a fire source is simulated using two types of deterministic fire model : Zone model and Field model. The zone model used is the CFAST(version 1.6) model developed at the Building and Fire Research Laboratories, NIST in the USA. The field model is a self-developed frie field model based on Computational Fluid Dynamic (CFD) theories. This article is focused on finding out the smoke movement and temperature distribution in atrium space which is cubic in shape. For solving the liked set of velocity and pressure equation, the PISO algorithm, which strengthened the velocity-pressure coupling, was used. Since PISO algorithm is a time-marching procedure, computing time si very fast. A computational procedure for predicting velocity and temperature distribution in fire-induced flow is based on the solution, in finite volume method and non-staggered grid system, of 3-dimensional equations for the conservation of mass, momentum, energy, species and so forth. The fire model i.e Zone model and Field model predicted similar results for clear heights and the smoke layer temperature.

Key Words: Atrium, Zone model, Field model, PISO algorithm, Non-staggered Grid