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A flowmeter for measuring the dispersed phase velocity in multiphase flow with non-uniform velocity profile

Al-Hinai, Sulaiyam and Lucas, Gary (2009) A flowmeter for measuring the dispersed phase velocity in multiphase flow with non-uniform velocity profile. Journal of the Japanese Society of Experimental Mechanics, 9. pp. 7-12. ISSN 1346-4930

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      This study aims to introduce a new technique to measure
      the velocity distribution of the dispersed component of a
      vertical, upward, water continuous two-phase pipe flow.
      Here, it is proposed that measurements of the variation in
      the local conductance of the mixture can be cross
      correlated to determine the local velocity distribution of,
      for example, gas bubbles in water.
      The measurements were conducted by using arrays of
      axially separated conductance sensors placed normal to the
      flow. Each array contained eight electrodes distributed
      over the internal circumference of the pipe carrying the
      flow. The arrays, were mounted at a known distance from
      each other along the pipe. Within each array, individual
      electrodes could be configured as either ‘excitation’,
      ‘measurement’ or ‘earth’. By changing the electrode
      configuration of an array the electric field sensitivity
      distribution associated with the array could be altered, thus
      changing the region of the flow ‘interrogated’ by the
      system. By cross correlating the output signals from these
      arrays, in various combinations, the velocity of the
      dispersed phase can be obtained at different regions within
      the flow, thereby enabling the velocity profile of the
      dispersed phase to be measured.
      The sensitivity distribution associated with given electrode
      configurations has been investigated in a bench test. First
      the flow meter was filled with water, and then nonconducting
      rods were inserted into the flow meter at
      various spatial locations parallel to the pipe, the resulting
      change in conductance was measured.. The sensitivity
      distribution has also been simulated using COMSOL
      software. Agreement between experiment and theory was
      close to 1 %.

      Item Type: Article
      Additional Information: Copyright © 2009 JSEM
      Subjects: T Technology > TJ Mechanical engineering and machinery
      Schools: School of Computing and Engineering
      School of Computing and Engineering > High-Performance Intelligent Computing > High Performance Computing Research Group
      School of Computing and Engineering > Systems Engineering Research Group
      Related URLs:
      Depositing User: Cherry Edmunds
      Date Deposited: 22 Feb 2010 15:04
      Last Modified: 14 Jun 2011 10:30


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