The cyclic vortex rings, which are generated cyclically by a pulsating jet, appear to be an effective method for particles and fluids transport. In order to identify the formation conditions of cyclic vortex rings that are optimal for transport, the effect of the formation conditions of cyclic vortex rings, such as the velocity pulsation amplitude, period and acceleration of jet pulsation conditions, and conditions of including intermittent period, on the axis symmetry characteristics of behavior of vortex rings is investigated experimentally. The results indicate that the axis symmetry characteristics of cyclic vortex rings begin to loss by the following four factors, the influence of separated vortex rings, the influence of trailing vortex rings, the influence of trailing vortex rings formed in the previous cycle, and the influence of the cyclic vortex ring formed in the previous cycle. The behavior of cyclic vortex rings can be classified into three types, and is determined by the combination of loss-inducing factors and their individual strengths. We also discuss the formation conditions of cyclic vortex rings that are optimal for transport.
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ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
July 26–31, 2015
Seoul, South Korea
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5732-8
PROCEEDINGS PAPER
The Optimal Formation Condition of the Axis-Symmetry Cyclic Vortex Rings
Fujio Akagi,
Fujio Akagi
Fukuoka University, Jyounan-ku, Japan
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Kazuki Hifumi,
Kazuki Hifumi
Fukuoka University, Jyounan-ku, Japan
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Katsuya Mizuki,
Katsuya Mizuki
Fukuoka University, Jyounan-ku, Japan
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Youichi Ando,
Youichi Ando
Fukuoka University, Jyounan-ku, Japan
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Sumio Yamaguchi
Sumio Yamaguchi
Fukuoka University, Jyounan-ku, Japan
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Fujio Akagi
Fukuoka University, Jyounan-ku, Japan
Kazuki Hifumi
Fukuoka University, Jyounan-ku, Japan
Katsuya Mizuki
Fukuoka University, Jyounan-ku, Japan
Youichi Ando
Fukuoka University, Jyounan-ku, Japan
Sumio Yamaguchi
Fukuoka University, Jyounan-ku, Japan
Paper No:
AJKFluids2015-24465, V01AT24A003; 8 pages
Published Online:
April 4, 2016
Citation
Akagi, F, Hifumi, K, Mizuki, K, Ando, Y, & Yamaguchi, S. "The Optimal Formation Condition of the Axis-Symmetry Cyclic Vortex Rings." Proceedings of the ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. Volume 1A: Symposia, Part 2. Seoul, South Korea. July 26–31, 2015. V01AT24A003. ASME. https://doi.org/10.1115/AJKFluids2015-24465
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