摘要
PyroSim软件常用于火灾模拟研究中,本文基于网格选取的基本原则以及对近年来运用此软件进行火灾数值模拟研究的网格经验分析,建立理想化模型,探索此软件是否对网格尺寸设限,从而确认PyroSim软件是否可作为街区层级的火灾数值模拟选择应用软件。同时,通过反复试验对比发现,网格尺寸与热释放速率有很大的关系,并且两因素均对程序的运行过程有影响。研究者应基于研究目的确定建模精度,根据火灾场景确定热释放速率,调整热释放速率与网格尺寸的取值,使程序稳定运行。
PyroSim is one of the commonly used software for fire simulation.Based on the basic principles of grid selection and the analysis on previous grid experience when using this software for fire numerical simulation research in recent years,this paper establishes an idealized model and explores whether the software limits the grid size,so as to confirm whether the PyroSim software can be used as a block scale fire numerical simulation software.At the same time,through repeated experiments and comparisons,it is found that the grid size has a great relationship with the heat release rate,and both factors have an impact on the simulation process.The researcher should determine the modeling accuracy based on the research purpose,determine the heat release rate according to the fire scene,and adjust the value of the heat release rate and the grid size to make the simulation run stably.
作者
秦闰琦
李新建
Qin Runqi;Li Xinjian(School of Architecture,Southeast University,Nanjing Jiangsu 210000,China)
出处
《城市建筑》
2021年第9期107-109,共3页
Urbanism and Architecture
基金
国家自然科学基金面上项目“整合传统与现代技术的密集型历史聚落火灾蔓延仿真模拟及性能化防控设计方法”(51678129)
江苏省文物局科研课题“建筑遗产预防性保护的国内经验和江苏省工作路径研究”(2019SK03)。
