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Numerical treatment of laminar flow in helically coiled tubes of square cross section. Part II. Oscillating helically coiled tubes

✍ Scribed by B. Joseph; R. J. Adler

Publisher: American Institute of Chemical Engineers
Year: 1975
Tongue: English
Weight: 584 KB
Volume: 21
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690210520

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✦ Synopsis

Abstract

The numerical method of Part I is extended to study periodic laminar flow in helically coiled tubes of square cross section oscillating sinusoidally about their helix axis. Depending on the relative strength of the wall velocity and the velocity of flow through the tube, one of three flow regimes occur. When the wall velocity is small, the computed results resemble these for a stationary helix. When the wall velocity dominates, the direction of the secondary flow is reversed. When the wall and flow velocities are comparable, the secondary flow pattern varies periodically in time and sometimes alternates in direction.

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