ABSTRACT
The behavior of drops and bubbles, which may be present already in a system or may be generated through some physical or chemical means, varies depending on the gravitational environment. The possibility of suspending drops and bubbles freely in a low-gravity environment can be used for both research and technological purposes. The thermohydraulic effects on drops and bubbles within a fluid host will also be treated. The shape oscillations of freely supported drops and bubbles that are subjected to a stress field have been studied extensively. The theory for moving drops is in most respects very much like that for gas bubbles, except more complicated. Air bubbles were injected into the liquid column and were found to collect at the lower anvil. Very few low-gravity experiments on thermocapillary motion of gas bubbles have been conducted to date. The bubbles accelerated as they moved into warmer melt because of reduced viscosity.
