Author(s): Abhishek Mondal; Daniel Bung; Sebastien Erpicum
Linked Author(s): Sébastien Erpicum, Daniel B. Bung, Abhishek Mondal
Keywords: Imaging techniques Optical flow Particle tracking Bubble velocity
Abstract: Due to high sample rates and spatial resolutions of available camera sensors, computer vision methods have become a powerful tool that allow for a detailed analysis of multiphase flows, by observing the tracks of individual particles. Numerous studies have employed camera-based techniques to investigate various types of aerated flows, primarily focusing on void fraction and velocity distributions in weirs, stepped spillways, and hydraulic jumps. Only few attempts were made to determine the individual bubble velocity using their tracks in highly-turbulent flows with void fractions from 0 to 100 %. However, a combination of image processing methods and particle tracking technique may help to accomplish this challenging goal. In this study an attempt is made to initiate the determination of Lagrangian bubble velocity using a tracking approach.
Year: 2025