Accession Number : AD0473178


Title :   EFFECT OF PRESSURE CYCLES AND OF DISSOLVED AIR ON THE VISCOSITY OF WATER.


Descriptive Note : Technical rept.,


Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE


Personal Author(s) : Kestin, J ; Whitelaw, J H


Report Date : Oct 1965


Pagination or Media Count : 8


Abstract : Samples of triple-distilled, de-aerated water were subjected to two compression cycles, each to 350 atm., this pressure being maintained for periods of 24 hours and of 65 mins in each cycle. The viscosity of the water was measured by observing the logarithmic decrement of the damped harmonic motion of a sphere suspended from an elastic platinum-tungsten wire in a bomb containing the water. The effect of the pressure cycle was an increase in viscosity of 0.3%. This increase is consistent with the decrease in temperature which would result from an adiabatic expansion from 350 to 1 atm. and is inconsistent with the existence of a long-range relaxation process upon the release of pressure. Experimental results of the viscosity of water saturated by bubbling air through a sample for about 5 hours demonstrate that the viscosity of water is unaffected by the solution of air in it, and is unaffected by pressure cycles. (Author)


Descriptors :   *VISCOSITY , *WATER , PRESSURE , AIR , BUBBLES , MEASUREMENT , TEMPERATURE , RELAXATION TIME , VISCOMETERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE