The viscosity of heavy liquids such as oils

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Reference no: EM131313800

The viscosity of heavy liquids, such as oils, is frequently measured with a device that consists of a rotating cylinder inside a large cylinder.

The annular region between these cylinders is filled with liquid and the torque required to rotate the inner cylinder at constant speed is computed, a linear velocity profile being assumed.

For what ratio of cylinder diameters is the assumption of a linear profile accurate within 1% of the true profile?

Reference no: EM131313800

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