On Marangoni bubble motion at higher Reynolds and Marangoninumbers under microgravity
Abstract
The present paper deals with the numerical calculation of the velocity of a bubble in a liquid matrix driven by thermocapillarity. Theoretical data are compared with experimental data obtained by an orbit experiment carried out in the course of the German Spacelab  Dl  Mission. Contrary to the classical theory by Young et al., the numerical analysis takes into account the nonlinear terms of the governing equations (NavierStokes equation, continuity equation, energy equation). Comparison between theory and experiment shows that the classical theory, derived under the assumptions of creeping flow and heat conduction only, predicts bubbly speeds, which are too high, while the numerically computed bubble speeds are in satisfactory agreement with the experimental data.
 Publication:

Applied Microgravity Technology
 Pub Date:
 October 1987
 Bibcode:
 1987ApMT....1...27S
 Keywords:

 Cavitation Flow;
 Computational Fluid Dynamics;
 Flow Velocity;
 High Reynolds Number;
 Marangoni Convection;
 Reduced Gravity;
 Spacelab Payloads;
 Bubbles;
 Interfacial Tension;
 Microgravity Applications;
 NavierStokes Equation;
 Space Commercialization;
 Spaceborne Experiments;
 Temperature Gradients;
 Fluid Mechanics and Heat Transfer