Oilflow in a journal bearing can be treated as parallel flow betweentwo large isothermal plates with one plate moving at a constant velocityof 12 m/s and the other stationary. Consider such a flow with a uniformspacing of 0.7 mm between the plates. The temperature of the upperand lower plates are 47°C and 17°C, respectively. By simplifying andsolving the continuity, momentum, and energy equations, determine:(a) thevelocity andtemperature distributionsin the oil.(b ) the maximum temperature and where itoccurs.(The location ofmaximum temperature is determined bysetting dT/dy=0).(c) the heat flux from the oil to each plate 3- Oil flow in a journal bearing can be treated as parallel flow betweentwo large isothermal plates with one plate moving at a constant velocityof 12 m/s and the other stationary. Consider such a flow with a uniformspacing of 0.7 mm between the plates. The temperature of the upperand lower plates are 47°C and 17°C, respectively. By simplifying andsolving the continuity, momentum, and energy equations, determine:(a) the velocity and temperature distributions in the oil.(b) the maximum temperature and where itoccurs. (The location of maximum temperature is determined bysetting dT/dy=0).(c) the heat flux from the oil to each plate.и(у)

(a) Write the continuity equation. ∂u∂x+∂v∂y=0∂u∂x=0then,u=uy Write the momentum equation in…

Oilflow in a journal bearing can be treated as parallel flow between two large isothermal plates with one plate moving at a constant velocity of 12 m/s and the other stationary. Consider such a flow with a uniform spacing of 0.7 mm between the plates. The temperature of the upper and lower plates are 47°C and 17°C, respectively. By simplifying and solving the continuity, momentum, and energy equations, determine: (a) thevelocity andtemperature distributionsin the oil. (b ) the maximum temperature and where it occurs.(The location ofmaximum temperature is determined by setting dT/dy=0). (c) the heat flux from the oil to each plate

Oilflow in a journal bearing can be treated as parallel flow between two large isothermal plates with one plate moving at a constant velocity of 12 m/s and the other stationary. Consider such a flow with a uniform spacing of 0.7 mm between the plates. The temperature of the upper and lower plates are 47°C and 17°C, respectively. By simplifying and solving the continuity, momentum, and energy equations, determine: (a) thevelocity andtemperature distributionsin the oil. (b ) the maximum temperature and where it occurs.(The location ofmaximum temperature is determined by setting dT/dy=0). (c) the heat flux from the oil to each plate

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.65P

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Hydrodynamic journal bearings have been widely used to support high speed rotating machinery such as turbines and compressors because of their superior durability and load carrying capacity. Therefore, the bearings are important machine elements for enhancing the quality of the rotating machinery.Assuming that oil flow in a journal bearing can be treated as parallel flow between two large isothermal plates as shown in Figure 1 with one plate moving at constant velocity of 20 m/s and the other stationary. Consider such a flow with a uniform spacing of 1.8 mm between the plates. The temperatures of upper and lower plates are 45°C and 12°C, respectively. By simplifying and solving the momentum and energy transport equations in Appendix B, Derive the velocity and temperature profile in the oil. State all your postulateand assumptions. This is an old question not graded
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