An aluminum cylinder (s.g3D2.7) 15 cm high and with diameter d%38.1 cm slides down inside a tube with inner diameter D=8.2 cm, as shown in the figure. The cylinder is concentric with the axis of a tube and between them there is a thin film of oil of s.g. =0.8 with a kinematic viscosity of 0.075St. a) What is the (constant) rate of fall of the cylinder inside the tube? b) determine the torque needed to keep the inner cylinder rotating at an angular speed w=200rpm d. D

An aluminum cylinder (s.g3D2.7) 15 cm high and with diameter d%38.1 cm slides down inside a tube with inner diameter D=8.2 cm, as shown in the figure. The cylinder is concentric with the axis of a tube and between them there is a thin film of oil of s.g. =0.8 with a kinematic viscosity of 0.075St. a) What is the (constant) rate of fall of the cylinder inside the tube? b) determine the torque needed to keep the inner cylinder rotating at an angular speed w=200rpm d. D

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter3: The Structure Of Real Materials

Section: Chapter Questions

Problem 3.12P

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