A vertical shaft passes through a bearing and is lubricated with an oil having a viscosity of
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A vertical shaft passes through a bearing and is lubricated with an oil having a viscosity of \(0.2 \mathrm{~N} \cdot \mathrm{s} / \mathrm{m}^{2}\) as shown in Fig. P6.85. Assume that the flow characteristics in the gap between the shaft and bearing are the same as those for laminar flow between infinite parallel plates with zero pressure gradient in the direction of flow. Estimate the torque required to overcome viscous resistance when the shaft is turning at \(80 \mathrm{rev} / \mathrm{min}\).
Figure P6.85
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Munson Young And Okiishi's Fundamentals Of Fluid Mechanics
ISBN: 9781119080701
8th Edition
Authors: Philip M. Gerhart, Andrew L. Gerhart, John I. Hochstein
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