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Multiphase Science and Technology

Publicado 4 números por año

ISSN Imprimir: 0276-1459

ISSN En Línea: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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LENGTHS OF BUBBLE AND SLUG AND PRESSURE DROP IN GASLIQUID SLUG FLOW IN MICROCHANNELS

Volumen 24, Edición 3, 2012, pp. 239-256
DOI: 10.1615/MultScienTechn.v24.i3.40
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SINOPSIS

The characteristics of two-phase slug flow, i.e., bubble length and liquid slug length and pressure drop in horizontal circular and rectangular microchannels with T-junction-type gas−liquid mixer have been investigated. The inner diameter of the circular channel was 250 µm, and the hydraulic diameter of the rectangular one was 235 µm. In order to determine the effects of fluid properties, distilled water and aqueous solutions of ethanol having different mass concentrations of 49 and 100 wt% and HFE7200 were used as the test liquid, while nitrogen gas was used as the test gas. The bubble length data for circular and rectangular microchannels were well correlated with Sobieszuk et al.'s [Chem. Eng. Res. Des., vol. 88, pp. 263−269,2010] correlation. The ratio of the bubble length to bubble pitch, which is sum of the bubble length and the liquid slug length, could be correlated with the homogeneous void fraction, regardless of the channel geometries and the liquid properties. The two-phase pressure drop could be reasonably calculated with a unit cell model, except for flows with relatively larger capillary and Weber numbers.

CITADO POR
  1. Kawahara Akimaro, Mansour Mohamed H., Sadatomi Michio, Law Wen Zhe, Kurihara Hiroki, Kusumaningsih Haslinda, Characteristics of gas–liquid two-phase flows through a sudden contraction in rectangular microchannels, Experimental Thermal and Fluid Science, 66, 2015. Crossref

  2. Mansour Mohamed H., Kawahara Akimaro, Sadatomi Michio, Experimental investigation of gas–non-Newtonian liquid two-phase flows from T-junction mixer in rectangular microchannel, International Journal of Multiphase Flow, 72, 2015. Crossref

  3. Arias S., González-Cinca R., Analysis of the characteristic lengths in the bubble and slug flow regimes generated in a capillary T-junction, International Journal of Multiphase Flow, 87, 2016. Crossref

  4. KAWAHARA Akimaro, Gas-Liquid Two-Phase Flows in Micro-Channels, JAPANESE JOURNAL OF MULTIPHASE FLOW, 31, 3, 2017. Crossref

  5. MINAGAWA Hisato, ASAMA Hiroaki, YASUDA Takahiro, Void Fraction and Frictional Pressure Drop of Gas-Liquid Slug Flow in a Microtube, TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 79, 804, 2013. Crossref

  6. Kawahara Akimaro, Yonemoto Yukihiro, Arakaki Yoichi, Pressure Drop for Gas and Polymer Aqueous Solution Two-Phase Flows in Horizontal Circular Microchannel, Flow, Turbulence and Combustion, 105, 4, 2020. Crossref

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