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Numerical treatment of laminar flow in helically coiled tubes of square cross section. Part II. Oscillating helically coiled tubes
Author(s) -
Joseph B.,
Adler R. J.
Publication year - 1975
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690210520
Subject(s) - laminar flow , secondary flow , mechanics , flow (mathematics) , tube (container) , square (algebra) , cross section (physics) , section (typography) , flow conditioning , computer simulation , flow velocity , physics , geometry , materials science , mathematics , turbulence , reynolds number , composite material , business , quantum mechanics , advertising
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.