Determination Of Viscosity Of Oil By Falling-sphere Method Using Digital-imaging System

Viscosity is the most important physical property for lubricating oils. The measurementrnof viscosity resists on the velocity limit measurement of falling-ball, correctedrnprincipal identified effects (edge or wall effects, inertial effects, and end effects).rnIn this research falling-sphere technique is used to measure the viscosity of Totalrnquartz 20W50 motor oil by monitoring the terminal velocity at which a sphere fallsrnunder gravity in a cylindrical tube containing the test fluid. The experiments, thernsphere is monitored using video system and the position coordinate and time arernmeasured.rnThe principal difficulties with this system are the measurement of the velocity ofrnthe ball. The result of the experiment agree with the theoretical values and reportedrnvalue by Total oil company, even-though, there are uncertainties in measurement ofrnfalling velocity, corrected terminal velocity, density of sphere, and fluid and radius

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