Effects of axial corrugated roughness on low Reynolds number slip flow and continuum flow in microtubes / Zhipeng Duan in Journal of heat transfer, Vol. 132 N° 4 (n° spécial) (Avril 2010)  

Effects of axial corrugated roughness on low Reynolds number slip flow and continuum flow in microtubes [texte imprimé] / Zhipeng Duan, Auteur ; Y. S. Muzychka, Auteur . - pp. [041001-1/9].
Physique
Langues : Anglais (eng)
in Journal of heat transfer > Vol. 132 N° 4 (n° spécial) (Avril 2010) . - pp. [041001-1/9]

Mots-clés :	Corrugations Roughness Perturbation Slip flow Microtubes
Index. décimale :	536 Chaleur. Thermodynamique
Résumé :	The effect of axial corrugated surface roughness on fully developed laminar flow in microtubes is investigated. The radius of a microtube varies with the axial distance due to corrugated roughness. The Stokes equation is solved using a perturbation method with slip at the boundary. Analytical models are developed to predict friction factor and pressure drop in corrugated rough microtubes for continuum flow and slip flow. The developed model proposes an explanation on the observed phenomenon that some experimental pressure drop results for microchannel flow have shown a significant increase due to roughness. The developed model for slip flow illustrates the coupled effects between velocity slip and small corrugated roughness. Compressibility effect has also been examined and simple models are proposed to predict the pressure distribution and mass flow rate for slip flow in corrugated rough microtubes.
DEWEY :	536
ISSN :	0022-1481
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