Coupled Simulations of Indoor-Outdoor Flow Fields for Cross-Ventilation of a Building in a Simplified Urban Array
Coupled Simulations of Indoor-Outdoor Flow Fields for Cross-Ventilation of a Building in a Simplified Urban Array
复制标题
DOI：
10.3390/atmos9060217
复制
发表时间：
2018-06
期刊：
影响因子：
2.9
通讯作者：
Y. Murakami;N. Ikegaya;A. Hagishima;J. Tanimoto
中科院分区：
文献类型：
--
作者：
Y. Murakami;N. Ikegaya;A. Hagishima;J. Tanimoto
采用雷诺平均Navier-Stokes模型，对不同建筑物开口位置的建筑物阵列及其内部流场进行了计算流体动力学模拟。选取了10种开口位置组合，研究了开口位置对室内交叉通风率的影响。模拟结果表明，即使有建筑物开口，平均风速和湍流动能的外部分布也几乎没有变化。虽然观察到了类似的室外流场模式，但开口位置产生了两种不同类型的通风：单向和双向。在单向通风中，通过开口的风是单向的：在迎风壁处斜向下。在双向通气中，流入和流出通过同一开口同时发生。通风率的测定表明，通风类型可以解释什么类型的通风率可能是显着的每个开口位置。
Computational fluid dynamics simulations with a Reynolds-averaged Navier-Stokes model were performed for flow fields over a building array and inside a building in the array with different building opening positions. Ten combinations of opening locations were selected to investigate the effect of the locations on indoor cross-ventilation rates. The results of these simulations show that the exterior distributions of mean wind speed and turbulence kinetic energy hardly differ even though building openings exist. Although similar patterns of outdoor flow fields were observed, the opening positions produced two different types of ventilations: one-way and two-way. In one-way ventilation, the wind flows through the opening are unidirectional: diagonally downward at the windward wall. In two-way ventilation, both inflow and outflow simultaneously occur through the same opening. Determination of ventilation rates showed that the ventilation types can explain what type of ventilation rate may be significant for each opening location.