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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 on theme: "Cavitation Bubbles and Shockwaves in Microgravity 57th International Astronautical Congress 2006, Valencia, Spain D. Obreschkow, P. Kobel, N. Dorsaz, A."— Presentation transcript:

1 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

2 Cavitation & Erosion

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

4 Drop Formation & Fixation

5 Drop-Electrodes Interaction NeutralRepulsionAttraction

6 Drop Oscillations 1/e damp out time = 0.7s www.flashandsplash.ch

7 around the drop …

8 First Light

9 Peculiar Jet Geometry Phys. Rev. Lett. 97, 094502 (2006)

10 Surprising Lifecycle Phys. Rev. Lett. 97, 094502 (2006) Equation of Motion:

11

12 Flashing Mist 0.0ms0.08ms0.16ms

13 Single Microbubble

14 Sockwave Simulation

15 Simulation versus Observation

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

17 Cheers !

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