Cavitation, Tensile Strength, and the Surface Films of Gas Nuclei 



10 20 



TIME - MINUTES 



Fig. 6 - Tensile strength of David Taylor Model 

 Basin tunnel water after cavitation 



20 30 



TIME - MINUTES 



Fig. 7 - Comparison of the tensile strength 

 of David Taylor Model Basin water and 

 other purified waters 



Towing Basin — The Deep Water Towing Basin (east end) of the David Taylor 

 Model Basin had considerable film formation (Figs. 8 and 6). This water in this 

 sense was similar to natural waters, i.e., water obtained from the sea or lake. 

 Roughly speaking, the water is an order of magnitude slower in acquiring tensile 

 strength by dissolving than the tunnel or drinking water. One must conclude that 

 exposure of a large surface of water in the basin to contamination from the air, 



93 



