Experimental study on interfacial area transport of a vertical downward bubbly flow |
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| Authors: | T?Hibiki H?Goda S?Kim Email author" target="_blank">M?IshiiEmail author J?Uhle |
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| Institution: | (1) Research Reactor Institute, Kyoto University, Kumatori Sennan, 590-0494 Osaka, Japan;(2) School of Nuclear Engineering, Purdue University, 400 Central Drive, West Lafayette, IN, 47907-2017, USA;(3) Division of System Analysis and Regulatory Effectiveness Office of Research, US Nuclear Regulatory Commission, Washington, DC, 20555, USA |
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| Abstract: | In relation to the development of the interfacial area transport equation, local flow measurements of vertical downward air–water flows in a pipe with an inner diameter of 50.8 mm were performed at three axial locations of z/D=6.50, 34.0, and 66.5 as well as ten radial locations from r/R=0 to r/R=0.9 using a multi-sensor probe. In the experiment, the superficial liquid velocity and the void fraction ranged from –0.620 m/s to –2.49 m/s and from 0.21% to 8.4%, respectively. The dependence of the interfacial area transport on the liquid velocity, void fraction, and bubble size is discussed in detail. |
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