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The flow and heat transfer between a torsionally oscillating and a stationary disk

✍ Scribed by N. Dōhara

Publisher
Springer
Year
1981
Tongue
English
Weight
419 KB
Volume
15
Category
Article
ISSN
0022-0833

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✦ Synopsis

The flow between a torsionally oscillating and a stationary disk is considered. The solution in the form of a power series in e, the ratio of the amplitude of oscillations to the frequency, is obtained on the assumption that e << 1. The steady streaming motion is shown to be of the order of magnitude ~. The behaviour of steady radial and axial velocities is clarified. The shearing stress on either disk is also calculated.

The problem of heat transfer in this flow field is considered next. The time-averaged Nusselt numbers are calculated up to the third-order approximation in the e-expansion. The effect of the steady streaming flow upon the time-averaged heat-transfer rate is discussed.

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An investigation is made of fluid flow and heat transfer characteristics in a vertically-mounted circular cylinder. Motions are generated by the top endwaU disk, which oscillates about the central axis with rotation rate ~ = e2 cos(2t). The temperature of the top disk is higher than that of the bott