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Flow Patterns of Gas-Liquid Two-phase Flow through an Abrupt Expansion in Millimeter-Scale Rectangular Channel
| Title: | Flow Patterns of Gas-Liquid Two-phase Flow through an Abrupt Expansion in Millimeter-Scale Rectangular Channel |
| Authors: | Oke, Takashi Browse this author | | Kumagai, Takehiko Browse this author →KAKEN DB | | Iguchi, Manabu Browse this author |
| Keywords: | Gas-Liquid Two-Phase Flow | | Flow Pattern | | Abrupt Expansion | | Rectangular Channel | | Millimeter-Scale Channel |
| Issue Date: | 2010 |
| Publisher: | 日本実験力学会 |
| Journal Title: | 実験力学 |
| Journal Title(alt): | Journal of JSEM |
| Volume: | 10 |
| Issue: | Special Issue |
| Start Page: | 32 |
| End Page: | 37 |
| Publisher DOI: | 10.11395/jjsem.10.s32 |
| Abstract: | The effect of an abrupt expansion on the flow pattern of air-water two-phase flow in a millimeter-scale rectangular channel was investigated. The channel height was fixed as 0.19 mm, 0.50 mm, 1.00 mm and 2.00 mm. The expansion ratio was 5, 2.5, 1.67 and 1.25 for every channel height. The superficial velocity of air was varied from 5.0 cm/s to 80.0 cm/s and that of water was varied from 10.0 cm/s to 80.0 cm/s. As a result, a flow pattern with recirculation zone was observed in the channel height of 2.00 mm and 1.00 mm. This is the same pattern as that in the conventional scale pipes and ducts with an abrupt expansion. Furthermore, there was no effect of an abrupt expansion on the flow pattern when the expansion ratio was close to unity. On the other hand, in the channel height of 0.19 mm, each bubble spread in the lateral direction after it passed through the abrupt expansion. This is an interesting phenomenon in the small channel height. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/75036 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 熊谷 剛彦
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