As a part of the overall study of the behavior of rocket engine propellants stored in space vehicle tanks while exposed to weightlessness, a study was conducted to determine the hydrostatic stability characteristics of the liquid-vapor interface in a cylindrical container when subjected to low acceleration disturbances (less than 1 g) applied parallel to the longitudinal axis of the cylinder.nThe Bond number criterion, a dimensionless parameter consisting essentially of the ratio of acceleration to capillary forces, was found to be valid for predicting the regions of hydrostatic stability of the liquid-vapor inter face. The critical Bond number delineating the stable and unstable regions was independent of the applied acceleration field and was verified to be 0.84 for solid-liquid-vapor systems possessing 0° contact angles.
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