Quantitative visualization of swirl and cloud bubbles in Taylor–Couette flow
TypeArticles dans des revues avec comité de lecture
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 highspeed 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.
Showing items related by title, author, creator and subject.
FOKOUA, Georges; GABILLET, Céline; AUBERT, Adrien; COLIN, Catherine (2014)The study is an experimental investigation of the interactions between bubbles, coherent motion and viscous drag in a Taylor Couette flow, for the outer cylinder at rest. The cylinder radii ratio η is 0.91. Bubbles are ...
FOKOUA, Georges; GABILLET, Céline; COLIN, Catherine (2013)This study is an experimental investigation of the interactions between the bubbles, the coherent motion and the viscous drag in a Taylor Couette flow, for the outer cylinder at rest. The cylinder radius ratio is 0.9. ...
NDONGO FOKOUA, Georges; GABILLET, Céline; AUBERT, Adrien; COLIN, Catherine (AIP Publishing, 2015)An experimental investigation of the interactions between bubbles, coherent motion and viscous drag in a Taylor-Couette flow with the outer cylinder at rest is presented. The cylinder radii ratio η is 0.91. Bubbles are ...
OLLITRAULT, Michel; GABILLET, Céline; COLIN DE VERDIERE, Alain (2005)As two fluid particles separate in time, the entire spectrum of eddy motions is being sampled from the smallest to the largest scales. In large-scale geophysical systems for which the Earth rotation is important, it has ...
CROCI, Kilian; ARRIGONI, Michel; BOYCE, P; GABILLET, Céline; GRANDJEAN, Hervé; JACQUES, Nicolas; KERAMPRAN, Steven (2014)Mine fields and UneXploded Ordnances (UXO) become a danger regarding maritime activities. Since UXOs are strongly affected by marine corrosion after decades, they cannot be handled safely. A safe solution to get rid of ...