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Transport within a microtube induced by a surface acoustic wave

Published online by Cambridge University Press:  15 February 2001

Kwang-Hua W. Chu*
Affiliation:
24 Lane 260, Section 1, Muja Road, Taipei, Taiwan 11646, ROC
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Abstract

Continuum-mechanic derivations of the entrainment of rarefied gases induced by a surface acoustic wave (SAW) along the wall in a confined microtube are conducted by the perturbation method. Both no-slip and slip flow results are presented with the former ones matched with the previous approach by Yin and Fung. The critical reflux pressure-gradient values decrease as the Knudsen number increases from zero. Meanwhile, the (perturbed) mean flow induced by SAW along the wall of a microtube is proportional to the square of the wave-amplitude ratio which has been confirmed by previous experiments.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 2001

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