Turbulence Transition Process in a Solid-Liquid Two-Phase Channel Flow.

DOI

Bibliographic Information

Other Title
  • 矩形管内固液二相流の乱流遷移

Abstract

The presence of particles modifies the stability of the flow transition process to turbulence in two-phase flow. The objective of the study is experimentally to elucidate the transition process of a plane vertical Poiseuille flow containing solid particles, focusing in particular on the effects of particle volume fractions. Reynolds number based on the channel half-width and centerline velocity was set at Re=2500, 3000, and the volume fractions of particles, φv, ranged from 4.0×10-6 to 1.2×10-5. The time series of velocity of both phases were measured by a modified LDV, so that the spectral evolution of small disturbances under two conditions (that is, the inherent and forced fluctuations with respect to the growth of the flow disturbance) could be invesigated to clarify the transition mechanism of two-phase flow. The results revealed that the presence of particles suppressed and enhanced the disturbances. Moreover, the evolutionary mechanism of disturbances can be explained by calculating the scale of the wavelength of the fundamental distufbance and the distance between particles.

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Keywords

Details 詳細情報について

  • CRID
    1390282679672523904
  • NII Article ID
    130003817854
  • DOI
    10.11426/nagare1982.18.249
  • ISSN
    21854912
    02863154
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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