Mixing of Salinity-Stratified Water by Pneumatic Barriers. Report 1. Preliminary Investigations. Hydraulic Model Investigation.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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Preliminary tests were conducted at the U. S. Army Engineer Waterways Experiment Station to identify the process involved in mixing salinity-stratified bodies of water by means of a pneumatic bubble screen. Salinity, velocity, and photographic data from these tests serve as a basis for planning experiments that will ultimately develop scaling relations for the use of pneumatic screens as mixing devices. In a two-dimensional flume with an initially two-layer, density-stratified system, the flow pattern created by the operation of a pneumatic screen is a three-layer system. This flow was shown by flume tests using dye tracers on each side of the screen. A circulation cell is formed that draws water toward the pneumatic screen in the upper and lower layers, mixes the different-density waters in the immediate vicinity of the screen, and discharges the mixture as an intermediate-density wedge flowing away from the screen alongthe initial density interface. Modified author abstract
- Physical and Dynamic Oceanography
- Civil Engineering