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Anomalous Decrease in Flow Rates of Micro-Orifice Flows of Water With Increasing the Elapsed Time After Inception of the Flow

[+] Author Affiliations
Tomiichi Hasegawa, Akiomi Ushida, Hiroshige Uchiyama, Takatsne Narumi

Niigata University, Niigata, Japan

Paper No. AJK2011-14002, pp. 3279-3283; 5 pages
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by JSME


Flow rates under some pressure differentials were measured for the flow of water through micro-orifices. It was found that the flow rate decreases as the time has elapsed after inception of the flow under a constant pressure differential and that the decrease in flow rates is larger for city water than for pure water, and the gold orifice provides a less decrease with time in flow rates than the nickel orifice, although the flow rate at the incipient stage of the experimental run is lower in the gold orifice than in the nickel orifice.

Copyright © 2011 by JSME



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