Numerical study on using vortex flow to improve smoke exhaust efficiency in large-scale atrium fires

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Xiang Fang
  • Anthony CY Yuen
  • Guan H Yeoh
  • Eric WM Lee
  • Sherman CP Cheung

Detail(s)

Original languageEnglish
Pages (from-to)98-115
Journal / PublicationIndoor and Built Environment
Volume32
Issue number1
Online published13 Jul 2021
Publication statusPublished - Jan 2023

Abstract

A high-performance smoke exhaust system is vital for maintaining a tenable environment during fire accidents evacuation. This study proposes a novel vortex flow driven smoke exhaust system to delay the smoke filling process during the atrium fire accident. The complex fluid movement and combustion reactions were predicted using Fire Dynamics Simulator, and the predicted smoke filling process was identified by the least-square method. Good agreements between numerical predictions and experimental measurements for vertical temperature, tangential velocity profile and smoke interface height were achieved. The numerical outcomes revealed that the amount of fresh air supplied, heat release rate and exhaust fan's rate determined the smoke interface's final height. A parametric study was also carried out to investigate the dominating factor in maintaining a stable vortex flow to maximize the smoke exhaust efficiency. Numerical results showed that the vortex flow smoke exhaust system could slow down the smoke filling, and the stability of the swirling fire is crucial for the system's performance.

Research Area(s)

  • Atrium, CFD, Fire whirl, Smoke layer, Vortex flow

Citation Format(s)

Numerical study on using vortex flow to improve smoke exhaust efficiency in large-scale atrium fires. / Fang, Xiang; Yuen, Anthony CY; Yeoh, Guan H et al.
In: Indoor and Built Environment, Vol. 32, No. 1, 01.2023, p. 98-115.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review