Dispersion in an array of buildings in stable and convective atmospheric conditions
Dispersion in an array of buildings in stable and convective atmospheric conditions
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在稳定和对流的大气条件下分散在一系列建筑物中
DOI：
10.1016/j.atmosenv.2019.117100
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发表时间：
2020
影响因子：
5
通讯作者：
Marucci D
中科院分区：
文献类型：
--
作者：
Marucci D
通过风洞实验研究了大气分层对规则排列的矩形建筑物内部和上方流动和弥散的影响。三个稳定的和两个对流的入射边界层在理查森数从−1.5到0.29的范围内被测试。使用快速响应火焰电离检测器进行色散测量。结果表明，层结对羽流宽度的影响明显小于对垂直廓线的影响。稳定的层结不影响冠层内的羽流中心轴，但在不稳定的情况下，羽轴似乎偏离了中性情况的方向。在冠层以上，两种层结类型与中性情况相比，导致羽流偏转角增大。与中性情况相比，稳定层结中的冠层测量平均浓度高达两倍，而对流条件下的平均浓度则小三倍。在层结情况下，垂直湍流通量与垂直平均浓度梯度之间的比例关系也得到了证实。在这项工作中产生的高质量的实验数据可能有助于为非中性层结条件开发新的数学模型和参数，以及验证现有的和未来的数值模拟。
Wind tunnel experiments were conducted to study the impact of atmospheric stratification on flow and dispersion within and over a regular array of rectangular buildings. Three stable and two convective incoming boundary layers were tested with a Richardson number ranging from− 1.5 to 0.29. Dispersion measurements were carried using a fast response flame ionisation detector. The results show that the stratification effect on the plume width is significantly lower than the effect on the vertical profiles. Stable stratification did not affect the plume central axis inside the canopy, but in the unstable case the axis appeared to deviate from the neutral case direction. Above the canopy both stratification types caused an increase in the plume deflection angle compared to the neutral case. Measured mean concentrations in stable stratification were up to two times larger in the canopy compared to the neutral case, while in convective conditions they were to three times smaller. The proportionality between the vertical turbulent fluxes and the vertical mean concentration gradient was also confirmed in the stratified cases. The high-quality experimental data produced during this work may help developing new mathematical models and parametrisation for non-neutral stratified conditions, as well as validating existing and future numerical simulations.
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DOI：
10.1016/j.jweia.2020.104140
发表时间：
2019-08
影响因子：
4.8
作者：
Davide Marucci;M. Carpentieri
通讯作者：
Davide Marucci;M. Carpentieri
使用 PTV 测量街道峡谷中的湍流质量通量
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
Gábor Dezső;A. Stitou;J. Beeck;M. Riethmuller
通讯作者：
M. Riethmuller
影响因子：
4.3
作者：
Castro, Ian P.;Xie, Zheng-Tong;Coceal, O.
通讯作者：
Coceal, O.
影响因子：
7.4
作者：
Davide Marucci;M. Carpentieri
通讯作者：
Davide Marucci;M. Carpentieri
热分层对内外边界层湍流和色散的影响
影响因子：
4.3
作者：
Vincenzo Sessa;Zheng;S. Herring
通讯作者：
S. Herring