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2007.233: Scaling properties of coating flows in rectangular channels

2007.233: A. de Lozar, A.L. Hazel and A. Juel (2007) Scaling properties of coating flows in rectangular channels. Physical Review Letter, 99 (23). ISSN 0031-9007

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DOI: 10.1103/PhysRevLett.99.234501


We present an experimental study of the aspect-ratio dependence of two-phase displacement flows in channels of rectangular cross section. Above a buoyancy-dependent threshold Ca^t, we find that the bulk features of the flow depend only on a modified capillary number Ca^=[1+0.12(alpha-1)+0.018(alpha-1)2]Ca, where Ca is the unmodified capillary number and alpha is the aspect ratio. This novel scaling has tremendous practical significance because it implies that the bulk features of the flows in any rectangular channel can be inferred from those in a square channel for Ca^>Ca^t.

Item Type:Article
Subjects:PACS 2003 > 47 Fluid dynamics
MIMS number:2007.233
Deposited By:Ms Helen Kirkbright
Deposited On:17 December 2007

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