HyPer SMM wind tunnel tests: PTV pictures

In this study, windblown sand transport on flat ground is reproduced by means of Wind-Sand Tunnel Tests (WSTT) carried out in the wind tunnel L-1B of von Karman Institute for Fluid Dynamics. The aim of WSTT is twofold. On one hand, they are intended to characterize the incoming sand flux in open field conditions. On the other hand, they allow to properly tune cheaper Wind-Sand Computational Simulations. The wind tunnel setup implements a uniform 5-meter-long sand fetch as sand source. The sand flux saltation layer are characterized through Particle Tracking Velocimetry (PTV) technique. Sand transport is assessed along the sand fetch by setting the wind speed equal to 1.3, 1.5, 2 times the threshold one. For the complete wind tunnel setup and data analysis please refer to: Raffaele L., Coste, N., and Glabeke G. "Life-Cycle Performance and Cost Analysis of Sand Mitigation Measures: Toward a Hybrid Experimental-Computational Approach." Journal of Structural Engineering 148.7 (2022): 04022082. The study has been developed in the framework of the MSCA-IF-2019 research project Hybrid Performance Assessment of Sand Mitigation Measures (HyPer SMM, https://hypersmm.vki.ac.be/). This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant Agreement No. 885985本研究通过在冯·卡门流体动力学研究所（von Karman Institute for Fluid Dynamics）L-1B风洞中开展的风沙隧道试验（Wind-Sand Tunnel Tests, WSTT），复现平坦地面的风沙输运过程。该风沙隧道试验的研究目标兼具双重性：其一，用于表征野外开放环境下的入射沙通量特征；其二，可对低成本风沙计算模拟（Wind-Sand Computational Simulations）进行精准调校与优化。该风洞试验装置设置了一段长5米的均匀沙补给段作为沙源，风沙流跃移层（sand flux saltation layer）的特征通过粒子跟踪测速技术（Particle Tracking Velocimetry, PTV）进行表征。本试验通过将风速设置为临界起沙风速的1.3、1.5及2倍，对沙补给段沿线的风沙输运情况开展评估。关于完整的风洞试验装置搭建方案与数据分析流程，请参阅以下文献：Raffaele L.、Coste N.与Glabeke G.发表于《结构工程学报》（Journal of Structural Engineering）2022年第148卷第7期的论文《风沙防治措施的全生命周期性能与成本分析：迈向混合式实验-计算研究路径》，文章编号为04022082。本研究依托MSCA-IF-2019研究项目“风沙防治措施混合性能评估”（Hybrid Performance Assessment of Sand Mitigation Measures, HyPer SMM，https://hypersmm.vki.ac.be/）开展。本项目获得欧盟“地平线2020”研究与创新计划下的玛丽·居里奖学金协议（编号：885985）资助。