Fluid Mechanics of Longitudinal Contractions in the Small Intestine

[+] Author and Article Information
J. G. Melville

Auburn University, Auburn, Ala. 36830

N. Denli

The Institute of Hydraulic Research, University of Iowa, Iowa City, Iowa 52242

J Biomech Eng 101(4), 284-288 (Nov 01, 1979) (5 pages) doi:10.1115/1.3426259 History: Received March 26, 1979; Online October 21, 2010


Longitudinal contractions in the duodenum are shown to exit experimentally. A low Reynolds number model of flows induced by propagating longitudinal contractions is presented for circular conduits. Particle trajectories and time lines are shown to elucidate the flowfields. Longitudinal motor activity is shown to have the capability of satisfying the mixing function of the small intestine and to be a possible contributor of retrograde flow.

Copyright © 1979 by ASME
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