Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification
Smoke layer interface height is an important safety parameter in channel fire accidents. This paper proposed and compared three determination algorithms to estimated smoke layer interface height in channel fire simulation based on the characteristics of smoke layer interface during one-dimensional p...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-11-01
|
| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X22006864 |
| _version_ | 1828343561270067200 |
|---|---|
| author | Xi Zhang Xiaoyuan Dang Jie Li Xiaojie Chao Yulun Zhang Kai Chen |
| author_facet | Xi Zhang Xiaoyuan Dang Jie Li Xiaojie Chao Yulun Zhang Kai Chen |
| author_sort | Xi Zhang |
| collection | DOAJ |
| description | Smoke layer interface height is an important safety parameter in channel fire accidents. This paper proposed and compared three determination algorithms to estimated smoke layer interface height in channel fire simulation based on the characteristics of smoke layer interface during one-dimensional propagation stage. Reduced-scale experiments were also conducted to verify the predicted results. Results show that the dis-alignment of pressure gradient and density gradient, as well as velocity shear could generate vorticity. And vorticity motivates air entrainment of hot smoke. The vorticity at smoke layer interface is the largest in vertical direction. The smoke layer interface could be characterized by vertical component of temperature gradient, the vorticity perpendicular to longitudinal slice and horizontal component of velocity, among which the temperature gradient method was found to be suitable for determining the smoke layer interface height. And the prediction results by temperature gradient method agree with experimental data and empirical results well. |
| first_indexed | 2024-04-13T23:44:03Z |
| format | Article |
| id | doaj.art-ff95965c76c04ebfb3c60ca4f03b50dc |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-13T23:44:03Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-ff95965c76c04ebfb3c60ca4f03b50dc2022-12-22T02:24:24ZengElsevierCase Studies in Thermal Engineering2214-157X2022-11-0139102450Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verificationXi Zhang0Xiaoyuan Dang1Jie Li2Xiaojie Chao3Yulun Zhang4Kai Chen5Chongqing College of Mobile Communication, 401520, Chongqing, China; Chongqing Key Laboratory of Public Big Data Security Technology, 401420, Chongqing, ChinaChongqing College of Mobile Communication, 401520, Chongqing, China; Chongqing Key Laboratory of Public Big Data Security Technology, 401420, Chongqing, ChinaChongqing College of Mobile Communication, 401520, Chongqing, China; Chongqing Key Laboratory of Public Big Data Security Technology, 401420, Chongqing, ChinaChongqing College of Mobile Communication, 401520, Chongqing, China; Chongqing Key Laboratory of Public Big Data Security Technology, 401420, Chongqing, ChinaChongqing Key Laboratory of Public Big Data Security Technology, 401420, Chongqing, China; School of Civil Engineering, Central South University, 410075, China; Corresponding author. Institute of Disaster Prevention Science and Safety Technology, Central South University, 410075, China.Chongqing College of Mobile Communication, 401520, Chongqing, China; Chongqing Key Laboratory of Public Big Data Security Technology, 401420, Chongqing, ChinaSmoke layer interface height is an important safety parameter in channel fire accidents. This paper proposed and compared three determination algorithms to estimated smoke layer interface height in channel fire simulation based on the characteristics of smoke layer interface during one-dimensional propagation stage. Reduced-scale experiments were also conducted to verify the predicted results. Results show that the dis-alignment of pressure gradient and density gradient, as well as velocity shear could generate vorticity. And vorticity motivates air entrainment of hot smoke. The vorticity at smoke layer interface is the largest in vertical direction. The smoke layer interface could be characterized by vertical component of temperature gradient, the vorticity perpendicular to longitudinal slice and horizontal component of velocity, among which the temperature gradient method was found to be suitable for determining the smoke layer interface height. And the prediction results by temperature gradient method agree with experimental data and empirical results well.http://www.sciencedirect.com/science/article/pii/S2214157X22006864Fire simulationSmoke layer interface heightDetermination algorithmsComparative analysisExperimental verification |
| spellingShingle | Xi Zhang Xiaoyuan Dang Jie Li Xiaojie Chao Yulun Zhang Kai Chen Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification Case Studies in Thermal Engineering Fire simulation Smoke layer interface height Determination algorithms Comparative analysis Experimental verification |
| title | Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification |
| title_full | Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification |
| title_fullStr | Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification |
| title_full_unstemmed | Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification |
| title_short | Determination algorithms of smoke interface height in channel fire simulation: Data comparative analysis and experimental verification |
| title_sort | determination algorithms of smoke interface height in channel fire simulation data comparative analysis and experimental verification |
| topic | Fire simulation Smoke layer interface height Determination algorithms Comparative analysis Experimental verification |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X22006864 |
| work_keys_str_mv | AT xizhang determinationalgorithmsofsmokeinterfaceheightinchannelfiresimulationdatacomparativeanalysisandexperimentalverification AT xiaoyuandang determinationalgorithmsofsmokeinterfaceheightinchannelfiresimulationdatacomparativeanalysisandexperimentalverification AT jieli determinationalgorithmsofsmokeinterfaceheightinchannelfiresimulationdatacomparativeanalysisandexperimentalverification AT xiaojiechao determinationalgorithmsofsmokeinterfaceheightinchannelfiresimulationdatacomparativeanalysisandexperimentalverification AT yulunzhang determinationalgorithmsofsmokeinterfaceheightinchannelfiresimulationdatacomparativeanalysisandexperimentalverification AT kaichen determinationalgorithmsofsmokeinterfaceheightinchannelfiresimulationdatacomparativeanalysisandexperimentalverification |