APPROACHES TO DETERMINING THE GEOMETRIC PARAMETERS OF LIQUID DROPLETS USING DIGITAL IMAGE ANALYSIS
N. A. Nazarov1, I. N. Baranov1,2, N. B. Miskiv1,2, E. M. Starinskaya1,2
1Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: digital image processing, evaporating drops, sessile and suspended droplets, boundary detection, polynomial boundary closure, convex hull algorithm
Abstract
Currently, ongoing tasks involve research in the field of spray cooling, droplet interaction with complex surfaces, and droplet evaporation from solid walls. Automated digital image processing methods are utilized to conduct these experiments, particularly when recording large amounts of video data. This paper presents methods for recognizing objects in digital images to obtain quantitative characteristics of evaporating droplets in low-light conditions. New algorithms have been developed to identify and close object boundaries under conditions of limited visibility, enabling measurement of the geometric parameters of evaporating droplets. A comparison is made with data obtained using the manual image processing method, and the conditions for the applicability of the proposed algorithms are demonstrated.
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