In a journal bearing, the diameter of the shaft is 12 cm and the diameter of the sleeve is 12.04 cm. The bearing is lubricated by an oil with the following properties: For a shaft rotational speed of...

In a journal bearing, the diameter of the shaft is 12 cm and the diameter of the sleeve is 12.04 cm. The bearing is lubricated by an oil with the following properties:

For a shaft rotational speed of 1100 revolutions per minute, with no load, measurements show that the temperature drop across the lubricant oil layer is 18°C, while the sleeve surface temperature is 20°C. For these operating conditions,

 a. Calculate the shaft torque

b. Find the total viscous dissipation rate and the total heat transfer rate through the journal bearing