In the present study, the effects of inlet geometry on the microscale two-phase flow patterns have been examined. The relationships among the flow pattern, the void fraction, the pressure loss and the heat transfer coefficient have been also investigated under different inlet flow conditions. At the inlet, a stainless steel tube is inserted into the micro glass tube, of which inner diameter is 300 and 600 μm. The gas and liquid paths and the diameter of the inner tube are interchangeable. The flow patterns are recorded at the inlet and also in the developed region in the micro tubes. The flow patterns observed in the 600 μm tube are bubbly, slug, churn and annular flows, while bubbly and churn flows are not present in the 300 μm tube. For bubbly and slug flows, bubble formation process is found to be strongly affected by the inlet conditions. Accordingly, the pressure loss as well as the heat transfer rate are changed. In addition, the bubble size is not uniquely determined; bubbles of different sizes are observed in repeated experiments under the same inlet flow conditions. On the other hand, for churn and annular flows, the flow patterns are not affected by the inlet conditions.
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ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4276-2
PROCEEDINGS PAPER
The Effects of Inlet Flow Conditions on Gas-Liquid Two-Phase Flow in a Micro Tube Available to Purchase
Shota Hayashi,
Shota Hayashi
University of Tokyo, Tokyo, Japan
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Nobuhide Kasagi,
Nobuhide Kasagi
University of Tokyo, Tokyo, Japan
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Yuji Suzuki
Yuji Suzuki
University of Tokyo, Tokyo, Japan
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Shota Hayashi
University of Tokyo, Tokyo, Japan
Nobuhide Kasagi
University of Tokyo, Tokyo, Japan
Yuji Suzuki
University of Tokyo, Tokyo, Japan
Paper No:
HT2007-32916, pp. 707-714; 8 pages
Published Online:
August 24, 2009
Citation
Hayashi, S, Kasagi, N, & Suzuki, Y. "The Effects of Inlet Flow Conditions on Gas-Liquid Two-Phase Flow in a Micro Tube." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 707-714. ASME. https://doi.org/10.1115/HT2007-32916
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