Online ISSN : 1880-2338
Print ISSN : 0385-8839
ISSN-L : 0385-8839
Volume 50, Issue 5
Displaying 1-1 of 1 articles from this issue
Technical papers
  • Takashi NOGUCHI, Akira MORITA, Nobuhiro HARADA, Tsuyoshi MAEDA, Katsuy ...
    Article type: Technical papers
    2022 Volume 50 Issue 5 Pages 303-314
    Published: 2022
    Released on J-STAGE: December 03, 2022

    Our aim is to understand the air entrainment into a suction pipe inside a suction sump in the vertical-wet-pit-pump configuration. This suction-sump flow accompanying the air entrainment often appears in various industrial and environmental problems, however is usually complicated owing to both its unsteadiness with poor periodicity and its fully-three-dimensionality. In the present study, from a viewpoint of the self-organised criticality (SOC), we conduct long-term measurements with a fine time resolution of 0.1 s using a CdS optical cell. As a result, the air entrainment is classified into two; one with short lifetime and the other with long lifetime. It is suggested that the latter is possibly related with SOC.

    Download PDF (2081K)