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Finite panel method for the simulation of wind-driven rain

机译：有限面板法模拟风雨

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摘要

In present numerical methods for the wind-driven rain (WDR) simulation, a large computational work for raindrop trajectories is required to obtain the distribution of the catch ratio because of the randomness of the initial conditions of the raindrops. A new method named Finite Panel Method (FPM) that is employed to acquire the catch ratio distribution is proposed to reduce the calculation amount and diminishes the randomness. In the FPM, raindrops ending in the corners of the panels which are divided on the surface are simulated, and then the distribution of catch ratio is acquired by a reconstruction method. As a demonstration, catch ratio results by FPM in typical flow fields are presented, including the case of the three-dimensional flow field of power-law velocity profile, and cases of the flow around two and three-dimensional low-rise buildings. The FPM results are compared with these calculated by the classical method and literature. The results indicate that FPM can reduce the calculation amount of raindrop trajectories with equivalent accuracy compared to the classical method. (C) 2016 Published by Elsevier Ltd.
机译：在当前的风雨模拟（WDR）的数值方法中，由于雨滴初始条件的随机性，需要大量的雨滴轨迹计算工作来获得捕获率的分布。为了减少计算量并减少随机性，提出了一种用于获取捕获率分布的新方法，称为有限面板法（FPM）。在FPM中，模拟了在表面被分割的面板的角处终止的雨滴，然后通过重构方法获得捕获率的分布。作为演示，介绍了FPM在典型流场中的捕获率结果，包括幂律速度剖面的三维流场的情况以及二维和三维低层建筑物周围的流的情况。将FPM结果与经典方法和文献计算得出的结果进行比较。结果表明，与经典方法相比，FPM可以以相同的精度减少雨滴轨迹的计算量。 （C）2016由Elsevier Ltd.出版

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  • 来源
    《Building and Environment》 |2016年第8期|358-368|共11页
  • 作者

    Jiang Chongwen; Xu Chenhao; Gao Zhenxun; Lee Chunhian;

  • 作者单位

    Beihang Univ, Natl Lab Computat Fluid Dynam, Sch Aeronaut Sci & Engn, 37th Xueyuan Rd, Beijing 100191, Peoples R China;

    Beihang Univ, Natl Lab Computat Fluid Dynam, Sch Aeronaut Sci & Engn, 37th Xueyuan Rd, Beijing 100191, Peoples R China;

    Beihang Univ, Natl Lab Computat Fluid Dynam, Sch Aeronaut Sci & Engn, 37th Xueyuan Rd, Beijing 100191, Peoples R China;

    Beihang Univ, Natl Lab Computat Fluid Dynam, Sch Aeronaut Sci & Engn, 37th Xueyuan Rd, Beijing 100191, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Wind-driven rain; Catch ratio; Numerical simulation; Finite panel method; Reconstruction;

    机译：风雨;捕获率;数值模拟;有限面板法;重构;

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