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Slit Flow Stabilization by Swirl in the Boundary Region Between Concurrent Thin-Liquid Layers

[+] Author Affiliations
Shinzaburo Umeda, Seizou Hasegawa

Fukuyama University, Fukuyama, Hiroshima, Japan

Akira Taniguchi, Shinzou Manmoto

Mayekawa Manufacturing Company, Tokyo, Japan

Kiyoshi Horii

Shirayuri Women’s College, Chofu, Japan

Paper No. FEDSM2003-45187, pp. 1385-1391; 7 pages
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME


A duct nozzle with an X-shaped flow network has dramatically stabilized a slit liquid flow. This stability has been deduced by the swirl in the boundary region between concurrent thin-liquid layers. The concurrent-flow is the slit flow (thin-liquid layer) that is placed over the intersecting-flow in X-shaped channels. The swirl has been produced by flow oscillations in a right angle to the flow direction caused by the flip-flop phenomena in X-shaped channels. The swirl has absorbed the instability of a slit liquid flow as the energy for a swirling motion. An experimental study was performed to investigate the phenomena of two flows; a slit flow and a flip-flop flow placed over it. An experiment has been performed in two different ducts; a duct with X-shaped channels consisting of large diamond-shaped bundles and a duct with small size X-shaped channels in both sides. The velocity variations in their flow fields were measured using two-dimensional PIV and LDV. This study clarified the characteristics of velocity variations on the horizontal and vertical sections with different depths of their X-shaped channels.

Copyright © 2003 by ASME
Topics: Flow (Dynamics)



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