Quantitative visualization of swirl and cloud bubbles in Taylor–Couette flow
Language
en
Article de revue
This item was published in
Journal of Visualization. 2017-05, vol. 20, n° 2, p. 349-358
Springer
English Abstract
We develop a novel method to study the gas phase features in a bubbly Taylor–Couette flow when bubbles are arranged as elevated toroidal strings. The flow is recorded in the front view plane with a high speed camera for a ...Read more >
We develop a novel method to study the gas phase features in a bubbly Taylor–Couette flow when bubbles are arranged as elevated toroidal strings. The flow is recorded in the front view plane with a high speed camera for a Reynolds number of 1500 and a global void fraction of 0.14 %. An image processing algorithm is developed to discriminate bubbles accumulated in clouds near the inner cylinder (cloud bubbles) from bubbles trapped in the bulk flow by vortices (swirl bubbles). The analysis of the preferential positions, azimuthal velocities, and equivalent void fraction of clouds and swirl bubbles separately provides a new insight into the dynamics of the bubble’s entrapment.Read less <
English Keywords
Bubbly Taylor–Couette
Flow visualization
Algorithm
Discrimination
Origin
Hal imported