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- W81725367 abstract "An analysis of experimental data obtained in a sounding rocket campaign ispresented. Data were obtained in the sounding rocket Rexus-V launch, as partof a student campaign organized by ESA (European Space Agency). We tookpart in the campaign with the project Vib-Bip, which consisted in an experimentto study two-phase fluids behaviour in microgravity and hipergravity conditions.The experimental setup contained four test cells with different liquids and gasfractions, in order to generate bubbles with different characteristics. Two of thecells contained water and air in different proportions, the third cell containedsilicon oil and air, and the fourth one contained ethanol and air. The test cellscontained different liquids in order to determine the influence of surface tensionand viscosity, and different proportions of liquid and gas in order to determinethe influence of volume fraction in bubble behaviour.We obtained a high quality video from the rocket launch. The images havebeen analyzed in order to determine the acceleration (gravity) dependence ofbubble position and shape. The video reflects both microgravity andhipergravity phases. The video analysis has allowed us to determine thatbubble height inside the cavity depends directly on the acceleration rate ofchange, as well as on the air volume fraction. We have also observed thateccentricity is higher for lower accelerations. We have determined that bubblediameters are smaller when the acceleration rate of change is zero. Moreover,we have observed that bubble equivalent diameter decreases with surfacetension and increases with viscosity, while eccentricity and equivalent volumeincrease with surface tension and decrease with viscosity." @default.
- W81725367 created "2016-06-24" @default.
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- W81725367 date "2010-05-19" @default.
- W81725367 modified "2023-09-24" @default.
- W81725367 title "Analysis of experimental data obtained at a sounding rocket campaign" @default.
- W81725367 hasPublicationYear "2010" @default.
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