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Effect of buoyancy on the motion of a long bubble in a horizontal tube

par Atasi, Omer ;Khodaparast, Sepideh;Scheid, Benoît ;Stone, Howard H. A.
Référence Physical Review Fluids, 2, page (094304)
Publication Publié, 2017

Article révisé par les pairs

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Résumé :

As a confined long bubble translates along a horizontal liquid-filled tube, a thin film of liquid is formed on the tube wall. For negligible inertial and buoyancy effects, respectively, small Reynolds (Re) and Bond (Bo) numbers, the thickness of the liquid film depends only on the flow capillary number (Ca). However, buoyancy effects are no longer negligible as the diameter of the tube reaches millimeter length scales, which corresponds to finite values of Bo. We perform experiments and theoretical analysis for a long bubble in a horizontal tube to investigate the effect of Bond number (0.05