Table 2. Physical Size Comparison of the Coanda Effect and 
Typical Parallel Plate Separators 
Maximum Designed 
Mixture Flow Coanda-Effect Parallel 
Through the Separator Plate Separator 
Separator 
1 foot-6 inches 3 feet-3-1/2 inches 
Jlong nl foot long, 3 feet-6 inches 
wide, and 1 foot wide, and 1 foot-7 in 
6 inches high inches high 
3 feet long, 5 feet-9 inches long, 
2 feet wide, 3 feet-6 inches wide, 
and 1 foot-6 and 3 feet-2 inches 
inches high high 
CONCLUSIONS AND RECOMMENDATIONS 
1. The investigation conducted to date establishes the feasibility of 
using the Coanda effect principle in developing an oil-water separator. 
A separator based upon this concept will be considerably smaller than a 
laminar-flow separator of comparable capacity. 
2. Feasibility tests conducted on an experimental model of the separator, 
with an oil-water mixture containing 6% oil (mixture flow rate of 1.5 gpm), 
show that the oil content can be reduced to less than 3%. The extracted 
oil contained only 5% water. To make the separator practical, staging is 
necessary. 
3. Further, to improve the quality of extracted oil, an automated oil 
extraction rate controlling system is required. A concept of one such 
system given should be investigated by testing it on the experimental 
separator. 
4. Improvements in the separating effectiveness of the separator can be 
accomplished by modifying the velocity distribution of the mixture jet 
to alter the centrifugal acceleration on it. A conceptual design of such 
a modification has been formulated. 
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