In this study, we built a series of roughness surfaces in an atmospheric boundary layer (ABL) wind tunnel with the aim of determining the characteristics of flow and surface pressure around a rough surface placed on a deep turbulent boundary layer. The ABL has a significant role in the exchange and transfer of momentum close to the wall. In particular, the roughness sublayer (RS), the lower part of the ABL, is two times thicker than the average building height in an urban area. Therefore, it is thought that the thickness of the RS and urban canopy layer has a dominant effect in the formation of the typical characteristics of a fully developed turbulent boundary flow, such as mean and turbulent statistics. This study focuses on the measurement and understanding of the near wall flow and pressure distribution around the roughness. In addition, the roughness area density and pattern were used in three cases for area density (defined as total plan area of roughness surface/total are...

中文翻译：

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粗糙度区域密度和表面图案对近壁流动和表面压力影响的实验研究

在这项研究中，我们在大气边界层（ABL）风洞中构建了一系列粗糙表面，目的是确定位于深湍流边界层上的粗糙表面周围的流动和表面压力特征。ABL在靠近墙的动量交换和传递中起着重要作用。特别是，粗糙层（RS），即ABL的下部，是市区平均建筑高度的两倍。因此，可以认为，RS和城市冠层的厚度在充分发展的湍流边界流的典型特征（例如均值和湍流统计）的形成中起主要作用。这项研究的重点是对粗糙度附近壁流和压力分布的测量和理解。此外，