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| HAL: hal-00664966, version 1 |
| DOI: 10.1209/0295-5075/95/64003 |
| See detailed view |  BibTeX,EndNote,... |
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| Europhysics Letters 95, 6 (2011) |
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| Direct numerical simulation of 2D channel flows in the presence of polymers |
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| Yong Liang Xiong 1, 2Charles-Henri Bruneau 1, 2 |
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| (2011) |
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| We here use direct numerical simulations to describe the flow of a viscoelastic fluid, modeled using the so-called Oldroyd B model, around a cylinder in two dimensions. A wide range of flow parameters is covered in these simulations allowing to draw definitive conclusions as to the effect of viscoelasticity on such a flow situation. Both drag enhancement and drag reduction are observed and a phase diagram is proposed in the parameter space Reynolds number vs. Weissenberg number. While only drag enhancement is observed below a Reynolds number of 40, both drag enhancement and drag reduction are observed for higher Reynolds numbers indicating that drag reduction is a feature associated with the shedding of vortices behind the cylinder. An interesting observation accompanies the onset of drag enhancement in the vortex-shedding regime: the shedding is suppressed. |
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| 1: | Institut de Mathématiques de Bordeaux (IMB) |
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CNRS : UMR5251 – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II |
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| 2: | MC2 (INRIA Bordeaux - Sud-Ouest) |
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INRIA – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II – CNRS : UMR |
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| 3: | Université Sciences et Technologies - Bordeaux 1 |
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Université Sciences et Technologies - Bordeaux I |
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| Domain | : | Mathematics/Numerical Analysis Physics/Condensed Matter/Soft Condensed Matter |
| hal-00664966, version 1 | |
| http://hal.inria.fr/hal-00664966 | |
| oai:hal.inria.fr:hal-00664966 | |
| From: Charles-Henri Bruneau | |
| Submitted on: Tuesday, 31 January 2012 18:54:54 | |
| Updated on: Sunday, 26 August 2012 18:01:20 | |
