Publication

Direct effects of gravity on cavitation bubble collapse

Mohamed Farhat, Danail Obreschkow, Philippe Kobel
2007
Conference Papers

Abstract

We propose an experiment for studying the final stages of collapse of a single laser generated cavitation bubble in microgravity. Unlike previous investigations, the goal of the study is to examine the direct effects of gravity on the cavity collapse. In this paper we present ground-based research on these effects and outline a microgravity experiment destined for ESA Microgravity Research Campaign. The proposed experiment uses a focused laser to generate a highly spherical bubble in an extended water volume without disturbing the liquid and measures bubble rebound and shockwave intensity. Buoyancy forces being proportional to bubble volume, smaller bubbles are the least disturbed. Results show that as bubble size decreases, the part of bubble energy transformed into a shockwave increases, to the detriment of the rebound bubble and liquid jets.

Official source

https://infoscience.epfl.ch/entities/publication/1e6d8136-f001-4cfc-a27c-0a374f754e0a

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Mohamed Farhat, Danail Obreschkow, Philippe Kobel
2007
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1e6d8136-f001-4cfc-a27c-0a374f754e0a

About this result

Related concepts (32)

Bubble (physics)

A bubble is a globule of a gas substance in a liquid. In the opposite case, a globule of a liquid in a gas, it's called a drop. Due to the Marangoni effect, bubbles may remain intact when they reach the surface of the immersive substance. Bubbles are seen in many places in everyday life, for example: As spontaneous nucleation of supersaturated carbon dioxide in soft drinks As water vapor in boiling water As air mixed into agitated water, such as below a waterfall As sea foam As a soap bubble As given off in chemical reactions, e.

Soap bubble

A soap bubble is an extremely thin film of soap or detergent and water enclosing air that forms a hollow sphere with an iridescent surface. Soap bubbles usually last for only a few seconds before bursting, either on their own or on contact with another object. They are often used for children's enjoyment, but they are also used in artistic performances. Assembling many bubbles results in foam. When light shines onto a bubble it appears to change colour.

Weightlessness

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Related publications (2)

Direct effects of gravity on cavitation bubble collapse

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Detailed Jet Dynamics in a Collapsing Bubble

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