中国物理B ›› 2019, Vol. 28 ›› Issue (1): 10505-010505.doi: 10.1088/1674-1056/28/1/010505

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Effect of exit location on flow of mice under emergency condition

Teng Zhang(张腾), Shen-Shi Huang(黄申石), Xue-Lin Zhang(张学林), Shou-Xiang Lu(陆守香), Chang-Hai Li(黎昌海)   

  1. 1 State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;
    2 School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404000, China
  • 收稿日期:2018-07-07 修回日期:2018-11-07 出版日期:2019-01-05 发布日期:2019-01-05
  • 通讯作者: Shou-Xiang Lu E-mail:sxlu@ustc.edu.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB1200404).

Effect of exit location on flow of mice under emergency condition

Teng Zhang(张腾)1, Shen-Shi Huang(黄申石)1, Xue-Lin Zhang(张学林)1,2, Shou-Xiang Lu(陆守香)1, Chang-Hai Li(黎昌海)1   

  1. 1 State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;
    2 School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404000, China
  • Received:2018-07-07 Revised:2018-11-07 Online:2019-01-05 Published:2019-01-05
  • Contact: Shou-Xiang Lu E-mail:sxlu@ustc.edu.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB1200404).

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摘要：

The evacuation of crowds in a building has always emerged as a vital issue in many accidents. The geometrical structure of a room, especially the exit design has a great influence on crowd evacuation under emergency conditions. In this paper, the effect of exit location of a room on crowd evacuation in an emergency is investigated with mice. Two different exits are set in a rectangular chamber. One is located in the middle of a wall (middle-exit) and the other is at the corner of the chamber (corner-exit). Arching and clogging are observed in the flow of mice. The result based on the escape trajectories of mice shows a dynamic balance in the arch near the exit wherever the exit is located. We demonstrate that the occupant position in the arch has an effect on the escape sequence of mice. At a low stimulation level, the narrow middle-exit is more effective in increasing the flow rate of mice than the narrow corner-exit. However, the opposite result appears when the exit becomes wider. At a high stimulation level, the effect of exit location on flow of mice tends to be weakened. The results suggest that the specific level of stimulation needs to be taken into account when optimizing the evacuation efficiency of a crowd through the geometrical structure of a room.

关键词: exit location, evacuation, mice, stimulation level

Abstract:

The evacuation of crowds in a building has always emerged as a vital issue in many accidents. The geometrical structure of a room, especially the exit design has a great influence on crowd evacuation under emergency conditions. In this paper, the effect of exit location of a room on crowd evacuation in an emergency is investigated with mice. Two different exits are set in a rectangular chamber. One is located in the middle of a wall (middle-exit) and the other is at the corner of the chamber (corner-exit). Arching and clogging are observed in the flow of mice. The result based on the escape trajectories of mice shows a dynamic balance in the arch near the exit wherever the exit is located. We demonstrate that the occupant position in the arch has an effect on the escape sequence of mice. At a low stimulation level, the narrow middle-exit is more effective in increasing the flow rate of mice than the narrow corner-exit. However, the opposite result appears when the exit becomes wider. At a high stimulation level, the effect of exit location on flow of mice tends to be weakened. The results suggest that the specific level of stimulation needs to be taken into account when optimizing the evacuation efficiency of a crowd through the geometrical structure of a room.

Key words: exit location, evacuation, mice, stimulation level

中图分类号:  (Self-organized systems)

  • 05.65.+b
45.70.Mg (Granular flow: mixing, segregation and stratification)