Accession Number:

AD0271920

Title:

FREE FALL BREAKUP OF BULK LIQUIDS

Descriptive Note:

Technical rept.

Corporate Author:

CHEMICAL RESEARCH AND DEVELOPMENT LABS EDGEWOOD ARSENAL MD

Report Date:

1961-09-01

Pagination or Media Count:

43.0

Abstract:

The mechanism and fundamental characteristics of the breakup of large masses of liquid under freefall conditions were investigated in relation to the high-altitude release of liquids from a container for the purpose of forming aerosols. This report describes the bulk-liquid breakup of 12.5 ml to 2.5 of water and 25 ml of dibutyl phthalate and dibutyl phthalate solutions containing 0.5 and 2 polyvinyl acetate, a high mol-wt. polymer. The liquid was released uniformly from a height of approximately 7 m to 8 m, and its breakup under free fall was recorded by high-speed photographic techniques. It was concluded that the predominant mode of breakup of a bulk-liquid mass subjected to free-fall conditions occurs by the bursting-gag or canopy-formation process, and that certain physical factors in the liquid mass, such as surface tension, size, initial shape, velocity at the time of release, and concentration of high-mol- wt. polymer, have a modifying effect on its breakup.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE