Local characteristics of two-phase gas-liquid flow in a microchannel downstream of T-shaped mixer

German V. Bartkus, Vladimir V. Kuznetsov

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

Two-phase gas-liquid flow in microchannels occurs in a variety of modern industrial applications. This paper presents the experimental results for the horizontal flow of liquids with different viscosity and gas nitrogen in two microchannels with rectangular cross-sections of 400×210 μm and 395×205 μm with T-shaped mixers. The experiments were conducted using the laser-scanning method, the high-speed video recording, and the laser-induced fluorescence. It was observed that elongated bubble flow, transition flow, and annular flow are the main flow patterns for a rectangular microchannel with a hydraulic diameter substantially less than the capillary constant. The flow pattern map was obtained for distilled water-nitrogen, 25% mass aqueous solution of glycerol -nitrogen, 40% mass aqueous solution of glycerol -nitrogen mixtures in a wide range of liquid and gas flow rates. Statistical characteristics of gas-liquid flow and distributions of the liquid film thickness in cross section of the microchannel were defined. The non-uniform liquid film thickness was experimentally observed at the channel cross-section. The statistical characteristics were determined for the flow of ethanol-nitrogen mixture. It was found that most of the liquid flow in the meniscus on the microchannel short side for the present gas and liquid flow rates.

Original languageEnglish
Pages (from-to)6255-6261
Number of pages7
JournalInternational Heat Transfer Conference
Volume2018-August
DOIs
Publication statusPublished - 1 Jan 2018
Event16th International Heat Transfer Conference, IHTC 2018 - Beijing, China
Duration: 10 Aug 201815 Aug 2018

Keywords

  • Flow patterns
  • Gas-liquid flow
  • Laser-induced fluorescence
  • Measurement and instrumentation
  • Microchannel
  • Nano/micro
  • Two-phase flow

OECD FOS+WOS

  • 2.07 ENVIRONMENTAL ENGINEERING
  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY
  • 1.04 CHEMICAL SCIENCES

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