Cavitation Bubbles and Shockwaves in Microgravity 57th International Astronautical Congress 2006, Valencia, Spain D. Obreschkow, P. Kobel, N. Dorsaz, A.

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Presentation transcript:

Cavitation Bubbles and Shockwaves in Microgravity 57th International Astronautical Congress 2006, Valencia, Spain D. Obreschkow, P. Kobel, N. Dorsaz, A. de Bosset, C. Nicollier, and M. Farhat

Cavitation & Erosion

Experimental Idea Confined shockwave Predicted liquid jets Interaction with spherical free surface Water Drop Cavitation Bubble

Drop Formation & Fixation

Drop-Electrodes Interaction NeutralRepulsionAttraction

Drop Oscillations 1/e damp out time = 0.7s

around the drop …

First Light

Peculiar Jet Geometry Phys. Rev. Lett. 97, (2006)

Surprising Lifecycle Phys. Rev. Lett. 97, (2006) Equation of Motion:

Flashing Mist 0.0ms0.08ms0.16ms

Single Microbubble

Sockwave Simulation

Simulation versus Observation

Overview Counterjet Geometry Change Lifetime Shortening Shockwave focusing amplifies 2nd cavitation "Injector tube" technique is useful Double-jet observations …

Cheers !