| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Purely Elastic Instability and Mixing Enhancement in a 3D Curvilinear Channel Flow |
| LI Feng-Chen1**, ZHANG Hong-Na1,2, CAO Yang1, KUNUGI Tomoaki2, KINOSHITA Haruyuki3, OSHIMA Marie3 |
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001
2Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
3Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan |
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| Cite this article: |
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LI Feng-Chen, ZHANG Hong-Na, CAO Yang et al 2012 Chin. Phys. Lett. 29 094704 |
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Abstract We report the detailed information of a purely elastic instability and its mixing enhancement effect in a viscoelastic fluid flow driven by a constant pressure gradient along a curvilinear channel obtained for the first time from the three-dimensional direct numerical simulations (DNSs) of this kind of flow geometry. Three-dimensional unstable flow structures similar to those visualized in experiments are realized through the DNSs. The inception of elastic instability, conformation of microstructures, statistical and dynamic information of velocity field and the mixing enhancement effect caused by elastic instability are then discussed.
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Received: 28 May 2012
Published: 01 October 2012
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| PACS: |
47.20.Gv
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(Viscous and viscoelastic instabilities)
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47.27.ek
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(Direct numerical simulations)
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47.27.Cn
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(Transition to turbulence)
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