2011 Fiscal Year Final Research Report
Measurement of Turbulence and Heat Transfer Enhancement Structure of Polymer Solution Flows in Microchannel
| Project/Area Number |
22760149
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
TATSUMI Kazuya 京都大学, 大学院・工学研究科, 准教授 (90372854)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 粘弾性流体 / 伝熱促進 / マイクロ流路 / 蛇行流路 / 二次流れ / 不安定性促進 |
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| Research Abstract |
Heat transfer and pressure loss measurements and flow visualization were carried out for viscoelastic fluid flow in a serpentine channel in order to evaluate the heat transfer enhancement performance of using such non-Newtonian fluids. Polyacrylamide water solution was used as viscoelastic fluid. The visualized flow patterns showed that unsteady flows and longitudinal vortex-like secondary flows are generated even under the condition of$ Re<$ 2. 0 in the viscoelastic fluid case. These flows produced a remarkable heat transfer enhancement effect compared to the case of Newtonian fluid. Further, a good correlation was observed between the heat transfer and pressure loss characteristics with the Weissenberg number.
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