in Titre de série : | European journal of mechanics. B, Fluids, Vol.15 No.2 | Titre : | Dispersion in oscillatory channel flow with coupled transverse wall motion | Type de document : | articles et extraits | Auteurs : | P. E. Hydon, Auteur ; T. J. Pedley, Auteur | Année de publication : | 1996 | Importance : | p.143-156 | ISBN/ISSN/EAN : | 0997-7546 | Langues : | Français (fre) | Résumé : | Solute is transported through a long finite straight channel with transversely oscillating walls at a rate which depends critically upon the steady-streaming Peclet number, P/sub s/. When P/sub s/>>1, the interaction between molecular diffusion and steady-streaming produces considerable enhancement of transport, relative to molecular diffusion alone. In some physiological applications (such as ventilation and blood flow), wall oscillations are accompanied by flow driven by an oscillatory pressure gradient; the wall motion and the pressure-driven flow have the same period. This paper is a study of solute transport in such a combined flow. We find that the addition of a pressure-driven flow significantly affects transport when P/sub s/<<1 but has no effect when P/sub s/>>1. Therefore the relatively high rate of transport observed at large values of P/sub s/ is maintained even when a pressure-driven component of flow is added to the wall-driven flow.
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in European journal of mechanics. B, Fluids, Vol.15 No.2. Dispersion in oscillatory channel flow with coupled transverse wall motion [articles et extraits] / P. E. Hydon, Auteur ; T. J. Pedley, Auteur . - 1996 . - p.143-156. ISSN : 0997-7546 Langues : Français ( fre) Résumé : | Solute is transported through a long finite straight channel with transversely oscillating walls at a rate which depends critically upon the steady-streaming Peclet number, P/sub s/. When P/sub s/>>1, the interaction between molecular diffusion and steady-streaming produces considerable enhancement of transport, relative to molecular diffusion alone. In some physiological applications (such as ventilation and blood flow), wall oscillations are accompanied by flow driven by an oscillatory pressure gradient; the wall motion and the pressure-driven flow have the same period. This paper is a study of solute transport in such a combined flow. We find that the addition of a pressure-driven flow significantly affects transport when P/sub s/<<1 but has no effect when P/sub s/>>1. Therefore the relatively high rate of transport observed at large values of P/sub s/ is maintained even when a pressure-driven component of flow is added to the wall-driven flow.
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