An experimental investigation was conducted to determine the viscous slosh-damping characteristics of several liquids having a wide range of kinematic vis¬cosities. The tests were conducted with three rigid spherical tanks 9.5, 20.5, and 32.0 inches in diameter. The kinematic viscosity of the contained liquid was varied from 1.23X10-6 to 1.183X10-2 square foot per second by utilizing mercury, acetylene tetrabromide, and several mixtures of water and glycerine. The first-mode slosh-force parameter was generalized for all values of kinematic viscosity and tank diameter investigated when presented as a function of dimensionless vis-cosity and excitation-amplitude parameters. The average first-mode damping ratio was observed to be independent of the excitation amplitude over the range inves¬tigated and was generalized for all values of kinematic viscosity and tank diam¬eter when presented as a function of the dimensionless viscosity parameter only.
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