3-D fire-spreading model for building clusters with large ground elevation variations
XU Zhen1, XUE Qiaorui1, LU Xinzheng2, SUN Xuan3
1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 3. Institute of Building Fire Research, China Academy of Building Research, Beijing 100013, China
Abstract：Existing fire-spreading models for building clusters mostly consider 2-D horizontal spreading without the influence of ground elevation, so they are not accurate for building clusters with large elevation changes. A 3-D fire-spreading model was developed here for building clusters with different ground elevations. Existing 2-D models were extended to 3-D models for the thermal radiation and plumes in a 3D fire-spreading model for building clusters. The 3-D fire spreading model was then verified against computational fluid dynamics (CFD) models. The model was then used to model the spreading of fires in Dukezong, Yunnan and Hot Spring Village, Guizhou as examples that have large elevation changes with the 3-D spreading results being more accurate than 2-D spreading results. Thus, this work provides a more accurate simulation method for fire spreading for building clusters in mountainous or hilly areas where the elevations change significantly.
许镇, 薛巧蕊, 陆新征, 孙旋. 考虑地面高程的建筑群三维火灾蔓延模型[J]. 清华大学学报（自然科学版）, 2020, 60(1): 95-100.
XU Zhen, XUE Qiaorui, LU Xinzheng, SUN Xuan. 3-D fire-spreading model for building clusters with large ground elevation variations. Journal of Tsinghua University(Science and Technology), 2020, 60(1): 95-100.
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