Author of the data: Raffaele, L., von Karman Institute for Fluid Dynamics, Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode, Belgium, lorenzo.raffaele@vki.ac.be Glabeke, G., von Karman Institute for Fluid Dynamics, Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode, Belgium, glabeke@vki.ac.be Data of data collection: 11/2020 keywords: wind tunnel, boundary layer, aeolian sand transport, particle image velocimetry, particle tracking velocimetry 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 For the 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. https://doi.org/10.1061/(ASCE)ST.1943-541X.0003344 Dataset have been recorded using the PIV data acquisition and visualization software DaVis 8.4 by LaVision GmbH. Dataset are stored in the .im7 file format and can be read and postprocessed using e.g. DaVis, Matlab, Python. Data contents: - HyPerSMM_PIV_pos2_* folders -> pictures/files for Particle Image Velocimetry of boundary layer wind flow on flat rough surface at position 2 - HyPerSMM_PIV_pos3_* folders -> pictures/files for Particle Image Velocimetry of boundary layer wind flow on flat rough surface at position 3 Each zipped folder contains: - subfolders 1,1_3,1_5,2 -> .im7 pictures recorded at 1,1.3,1.5,2 times the threshold velocity for sand transport - subfolders cal* -> .im7 calibration pictures - *.set files -> DaVis file storing experimental parameters Acquisition frequency: - HyPerSMM_PIV_pos2 -> 10Hz - HyPerSMM_PIV_pos3 -> 10Hz Time interval between two frames dt: - HyPerSMM_PIV_pos2/1 -> dt = 150e-6 s /1_3 -> dt = 99e-6 s /1_5 -> dt = 90e-6 s /2 -> dt = 90e-6 s - HyPerSMM_PIV_pos3/1 -> dt = 150e-6 s /1_3 -> dt = 99e-6 s /1_5 -> dt = 90e-6 s /2 -> dt = 90e-6 s Calibration plate: - circles diameter = 2.5 mm - distances along x and z between circle centers = 5 mm Position of the reference point on each calibration picture: - HyPerSMM_PIV_pos2: cal2 -> (x,y) = (2926 , 49) mm - HyPerSMM_PIV_pos3: cal3 -> (x,y) = (4526 , 49) mm Pictures resolutions: 2360x1776 pixels