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Consider a solid cylinder spinning inside a cylindrical cavity The gap between the cylinder and the wall of the cavity is constant in thickness and it is filed with ol

with the to lowing constant properties density p800 kgm', kinematic viscosity ve10m'/s, and thermal conductivity k0.13 Wi(mk). The diameter of the cylinder is D-75mm and the thickness of he gap between the cylinder and the cavity wall is L0.25 mm The cylinder spins at 3600 revolutions per minute and the ol flow is assumed to be laminar, steady and two dimensional The system in shown schematically in Figure Q9.

Fig: 1

Fig: 2