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Effects of gravity level on bubble formation and rise in low-viscosity liquids
Suñol Galofre, Francesc Xavier; González Cinca, Ricardo
Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. BIOCOM-SC - Grup de Biologia Computacional i Sistemes Complexos
We present an experimental analysis of the effects of gravity level on the formation and rise dynamics of bubbles. Experiments were carried out with millimeter-diameter bubbles in the hypergravity environment provided by the large-diameter centrifuge of the European Space Agency. Bubble detachment from a nozzle is determined by buoyancy and surface tension forces regardless of the gravity level. Immediately after detachment, bubble trajectory is deviated by the Coriolis force. Subsequent bubble rise is dominated by inertial forces and follows a zig-zag trajectory with amplitude and frequency dependent on the gravity level. Vorticity production is enhanced as gravity increases, which destabilizes the flow and therefore the bubble path.
Peer Reviewed
Àrees temàtiques de la UPC::Física
Bubbles
Gravity
SPHEROIDAL BUBBLE
OSCILLATORY PATHS
ROTATING FLOW
LIFT FORCES
WAKE
INSTABILITY
WATER
DRAG
STABILITY
VELOCITY
Bombolles
Gravetat -- Experiments
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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