Imperial College London
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Professor Washington Yotto Ochieng, EBS, FREng

Faculty of Engineering, Department of Civil and Environmental Engineering

Head of Department of Civil and Environmental Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6104w.ochieng Website

 
 
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Assistant

 

Ms Maya Mistry +44 (0)20 7594 6100

 
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Location

 

441/442Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cheong:2021:10.1177/03611981211032636,
author = {Cheong, H-I and Wu, Z and Majumdar, A and Yotto, Ochieng W},
doi = {10.1177/03611981211032636},
journal = {Transportation Research Record},
pages = {1244--1259},
title = {One-way coupling of fire and egress modeling for realistic evaluation of evacuation process},
url = {http://dx.doi.org/10.1177/03611981211032636},
volume = {2675},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In the discipline of fire engineering, computational simulation tools are used to evaluate the available safe egress time (ASET) and required safe egress time (RSET) of a building fire. ASET and RSET are often analyzed separately, using computational fluid dynamics (CFD) and crowd dynamics, respectively. Although there are advantages to coupling the ASET and RSET analysis to quantify tenability conditions and reevaluate evacuation time within a building, the coupling process is computationally complex, requiring multiple steps. The coupling setup can be time-consuming, particularly when the results are limited to the modeled scenario. In addition, the procedure is not uniform throughout the industry. This paper presents the successful one-way coupling of CFD and crowd dynamics modeling through a new simplified methodology that captures the impact of fractional effective dose (FED) and reduced visibility from smoke on the individual evacuee’s movement and the human interaction. The simulation tools used were Fire Dynamics Simulator (FDS) and Oasys MassMotion for crowd dynamics. The coupling was carried out with the help of the software development kit of Oasys MassMotion in two different example geometries: an open-plan room and a floor with six rooms and a corridor. The results presented in this paper show that, when comparing an uncoupled and a coupled simulation, the effects of the smoke lead to different crowd density profiles, particularly closer to the exit, which elongates the overall evacuation time. This coupling method can be applied to any geometry because of its flexible and modular framework.
AU  - Cheong,H-I
AU  - Wu,Z
AU  - Majumdar,A
AU  - Yotto,Ochieng W
DO  - 10.1177/03611981211032636
EP  - 1259
PY  - 2021///
SN  - 0361-1981
SP  - 1244
TI  - One-way coupling of fire and egress modeling for realistic evaluation of evacuation process
T2  - Transportation Research Record
UR  - http://dx.doi.org/10.1177/03611981211032636
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000706065700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://journals.sagepub.com/doi/10.1177/03611981211032636
UR  - http://hdl.handle.net/10044/1/104404
VL  - 2675
ER  -
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