Effects of vegetation on urban flows [TWT1 results]

The effect of vegetation on urban flows is studied with measurements of the flow past a surface mounted cube with openings, representing a building exposed to an atmospheric boundary layer. PIV data from NTUA WT experiment and LDV from KIT WT experiment are published.

The “twin test” involved measurements of the flow past a surface mounted cube, exposed to an atmospheric boundary layer. Measurements were performed for all experimental configurations both at Karlsruhe Institute of Technology (KIT) and the National Technical University of Athens (NTUA), in wind tunnels, at common locations around the building, in order to permit cross comparison of the results. However, the measurements were performed with different experimental measurement techniques: Laser Doppler Anemometry (LDA) at KIT and Particle Image Velocimetry (PIV) at NTUA.

The cube is intended to represent a building at a scale of 1:300, in agreement with the ABL scales. The height of the building model was H = 110 mm, and the vertical openings on its side were: (height), he = 90 mm and (width), we = 6 mm. Inside the building, in the center, there was a vertical column of square cross section (22x22 mm2). Besides the basic flow past the building model with smooth outer walls, tests were performed with modelled vegetation covering the windward façade and the roof of the building.

As an example, the strereo PIV setup used for the building wake measurements, that corresponds to the photo of the post, is presented:

Find out more and access the related data set:

Pappa, V., Gromke, C., & Bouris, D., 2023b. Twin test 1: Effect of vegetation on urban flows. PIV data from NTUA WT experiment and LDV from KIT WT experiment (1.0.0) [Data set]. Zenodo. DOI: 10.5281/zenodo.10019002

 

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