FM8_12769

XXI International Congress of Theoretical and Applied Mechanics
Warsaw, Poland, August 15-21, 2004

Lift Force on Bubbles and Particles in a Rotating Cylinder

Stefan Luther ⁽¹⁾, Hanneke Bluemink ⁽¹⁾, Ernst van Nierop ⁽¹⁾, Jacques Magnaudet ⁽²⁾, Andrea Prosperetti ⁽³⁾, Detlef Lohse ⁽¹⁾

1. University of Twente, Enschede, Netherlands
2. IMFT, Toulouse, France
3. The Johns Hopkins University, Baltimore, USA

We report on lift and drag coefficient measurements of bubbles and particles in a vortex flow. The Strouhal number Sr and Reynolds number Re are 0.1 < Sr < 1 and 0.01 < Re < 100 based on the typical bubble radius R_b about 1 mm. An increased drag is found in accordance with numerical experiments in linear shear flow. Negative lift coefficients are found for 0.1 < Re < 3.

View the extended summary