Numerical investigation of smoke dynamics in unconfined and confined environments

Chan Sol Ahn; Boo Hyoung Bang; Min Woo Kim; Tae Gun Kim; Scott C. James; Alexander L. Yarin; Sam S. Yoon

doi:10.1016/j.ijheatmasstransfer.2018.07.063

Numerical investigation of smoke dynamics in unconfined and confined environments

Chan Sol Ahn, Boo Hyoung Bang, Min Woo Kim, Tae Gun Kim, Scott C. James, Alexander L. Yarin, Sam S. Yoon

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Because of their implications to safety, the study of plume dynamics in high-rise buildings is a research area of interest to building engineers. In this study, the temperature, velocity, and pressure of smoke rising in buildings of various sizes were considered as functions of fire size, and were simulated using the Fire Dynamics Simulator software. Numerical results were validated against the analytical solutions for confined (building enclosure) and unconfined (open-air) systems. As the building area decreased and the fire size increased, buoyancy-driven flow accelerated and the overall building temperature increased. Additionally, the low pressure at the bottom of the building, which resulted from buoyant smoke, increased the vertical pressure gradient throughout the building. These parametric investigations can be used by building engineers concerned with smoke dynamics to develop design-safety guidelines.

Original language	English
Pages (from-to)	571-582
Number of pages	12
Journal	International Journal of Heat and Mass Transfer
Volume	127
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.063
Publication status	Published - 2018 Dec

Keywords

Buoyant smoke dynamics
Fire Dynamics Simulator
High-rise buildings
Wall effects

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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title = "Numerical investigation of smoke dynamics in unconfined and confined environments",

abstract = "Because of their implications to safety, the study of plume dynamics in high-rise buildings is a research area of interest to building engineers. In this study, the temperature, velocity, and pressure of smoke rising in buildings of various sizes were considered as functions of fire size, and were simulated using the Fire Dynamics Simulator software. Numerical results were validated against the analytical solutions for confined (building enclosure) and unconfined (open-air) systems. As the building area decreased and the fire size increased, buoyancy-driven flow accelerated and the overall building temperature increased. Additionally, the low pressure at the bottom of the building, which resulted from buoyant smoke, increased the vertical pressure gradient throughout the building. These parametric investigations can be used by building engineers concerned with smoke dynamics to develop design-safety guidelines.",

keywords = "Buoyant smoke dynamics, Fire Dynamics Simulator, High-rise buildings, Wall effects",

author = "Ahn, {Chan Sol} and Bang, {Boo Hyoung} and Kim, {Min Woo} and Kim, {Tae Gun} and James, {Scott C.} and Yarin, {Alexander L.} and Yoon, {Sam S.}",

note = "Funding Information: This research was supported by ICT & Future Planning ( NRF-2016M1A2A2936760 , NRF-2017R1A2B4005639 , NRF-2013R1A5A1073861) and the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science of South Korea. This work was also supported by the National Research Council of Science & Technology (NST) grant by South Korea government (MSIP) (No. CRC-16-02-KICT ). ",

year = "2018",

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doi = "10.1016/j.ijheatmasstransfer.2018.07.063",

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AU - Ahn, Chan Sol

AU - Bang, Boo Hyoung

AU - Kim, Min Woo

AU - Kim, Tae Gun

AU - James, Scott C.

AU - Yarin, Alexander L.

AU - Yoon, Sam S.

N1 - Funding Information: This research was supported by ICT & Future Planning ( NRF-2016M1A2A2936760 , NRF-2017R1A2B4005639 , NRF-2013R1A5A1073861) and the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science of South Korea. This work was also supported by the National Research Council of Science & Technology (NST) grant by South Korea government (MSIP) (No. CRC-16-02-KICT ).

PY - 2018/12

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N2 - Because of their implications to safety, the study of plume dynamics in high-rise buildings is a research area of interest to building engineers. In this study, the temperature, velocity, and pressure of smoke rising in buildings of various sizes were considered as functions of fire size, and were simulated using the Fire Dynamics Simulator software. Numerical results were validated against the analytical solutions for confined (building enclosure) and unconfined (open-air) systems. As the building area decreased and the fire size increased, buoyancy-driven flow accelerated and the overall building temperature increased. Additionally, the low pressure at the bottom of the building, which resulted from buoyant smoke, increased the vertical pressure gradient throughout the building. These parametric investigations can be used by building engineers concerned with smoke dynamics to develop design-safety guidelines.

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