On the flow of a non-Newtonian liquid induced by intestine-like contractions.
This paper considers the flow of an inelastic liquid which is generated by contractions like those of the intestine. Unlike regular peristaltic motion, these contractions occur locally over a finite length and have a finite amplitude. We adopt a contraction model due to Macagno and Christensen and repeat their analysis for an inelastic liquid. Our analysis, which is based on a Boundary Element Method, indicates that the net flow rate depends very weakly on the power-law index. The pumping action is therefore similar to that of a positive displacement pump.
Phan-Thien
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Department of Mechanical Engineering, University of Sydney, N.S.W., Australia.
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D004548:Elasticity; D005769:Gastrointestinal Motility; D008433:Mathematics; D008954:Models, Biological; D010528:Peristalsis; D011673:Pulsatile Flow; D012212:Rheology