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Link to published article [https://doi.org/10.1016/j.ijmultiphaseflow.2021.103641][1] This is an open access database of high-speed images and videos for modellers and researchers in the field of fluid mechanics studying the dynamics of a liquid jet transiting from the Rayleigh to the atomization regimes. The injector under examination has a single orifice 0.60 mm in diameter and was used to inject water into quiescent air at atmospheric temperature and pressure. Here, only the liquid injection pressure was varied, reaching a maximum Reynolds number of approximately 60 000. The recordings employ Laser Induced Fluorescence (LIF) for photographing of a fluorescing liquid. The dataset is divided into two parts. First, large field of view data is found in the file 161_mm_data.zip where a vertical length of 161 mm of the liquid is seen during recordings of ~800 images. Here, a single camera is used with injection pressures between 0.3-50 bar. The second part is found in the file 28_mm_data.zip that contains high resolution images of liquid for a vertical length of 28 mm, with two cameras. For the high resolution data there are not only recordings with different pressures between 10-40 bar, but also with different vertical positions of the camera with distances relating to the injector down to 350 mm. This enables a detailed view of different breakup regimes for liquid with different pressures. Both parts of the dataset are recorded in high-speed with 40 000 and 50 000 frames per second for the first and second part of the data respectively, which corresponds to a temporal resolution of 0.25 µs and 0.20 µs. The high resolution data (28 mm) used two high-speed cameras oriented at 90˚ to simultaneously record the fluorescence from the liquid. This approach allows for a calibration of the liquid depth for all pixels in a single camera, which have also been performed. Therefore the downloaded data contains, in addition to .png images, .csv files with decimal values of the calibrated liquid depth for each pixel. The calibration have a prediction variability of approximately 30% for the majority of the data, and 15% in best case scenarios, corresponding to depths in the range 0.75 to 1 mm. The technique is also shown to be nearly unbiased for the majority of the data. Thus, it is concluded that the measurement of liquid depth using the proposed technique is well suited for wind-induced breakup regimes but becomes much less reliable in the atomization regimes where the jet is fully disintegrated. More information of the optical arrangements, operating conditions, and the image post-processing methodologies used to obtain quantitative measurements of liquid depths can be found in an article accepted for publication in International Journal of Multiphase Flow, link will be given to the article shortly. For visualization of the data together with download links for recordings of specific pressures and positions, see: https://spray-imaging.com/water-jet.html [1]: https://doi.org/10.1016/j.ijmultiphaseflow.2021.103641
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