If laminar flow is induced at the surface of a disk due to rotation about its axis,
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If laminar flow is induced at the surface of a disk due to rotation about its axis, the local convection coefficient is known to be a constant, h = C, independent of radius. Consider conditions for which a disk of radius ro = 100 mm is rotating in stagnant air at Too = 20°C and a value of C = 20 W/m2 ∙ K is maintained.
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If an embedded electric heater maintains a surface temperature of T, = 50°C, what is the local heat flux at the surface of the disk? What is the total electric power requirement? What can you say about the nature of boundary layer development on the disk?
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KNOWN Local convection coefficient on rotating disk Radius and surface temperature of disk Temperatu...View the full answer
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Related Book For 
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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