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Dietrich Hoppe, Aliaksandr Zaruba, Horst-Michael Prasser

Modelling of Air Bubbles as Spheroids Based on a Pair of Parallel Planar Projections

Keywords: Bubble, elliptic fit, rotational spheroid

An air bubble rising in resting water is imaged by a parallel projection in two perpendicular horizontal directions. Initially, these two projections are approximated by ellipses. In the next step, the bubble is modelled as a spheroid matching the ellipses. The resulting spheroid is suitable to analyse the orientation of the symmetry axis of the bubble during its propagation through the liquid phase. The capabilities of the method are illustrated on an ensemble of bubbles rising on a helical trajectory.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 73, 02/2006
Pages: 103 - 108

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