There are many gas-liquid, liquid-liquid, and particle-liquid systems used aboard space platforms such as the international space station (ISS) and in future space exploration activities that involve the motion of bubbles, droplets, and particles in microgravity. In the absence of gravity, a particle would remain stationary in a liquid even if their densities are drastically different, but the particle can respond to small external vibrations, called g-jitter on space platforms. The vibrations may in turn be used to move the bubbles and particles in a controlled manner and achieve phase separation in a fluid-particle system. This work addresses the motion of a solid particle in a fluid cell subjected to a sinusoidal vibration with a certain frequency and amplitude. An inviscid model based on the method of images has been used to investigate the vibration-induced motion of a particle oscillating normal to a cell wall in a semi-infinite fluid-filled cell. The model that accounts for the virtual mass force but neglects the viscous drag and history forces is applied to predict the cell wall effect on the particle amplitude.
Wall effects on vibration-induced particle motion in a fluid cell in space
Wandeffekte auf die Schwingungs-induzierte Teilchenbewegung in einer Flüssigkeitszelle im Raum
AIAA Journal (online) ; 45 , 8 ; 2090-2092
2007
3 Seiten, 3 Bilder, 8 Quellen
Aufsatz (Zeitschrift)
Englisch
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