Asymptotic method for peristaltic transport |
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Authors: | M C Shen S M Shim A M Wu |
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Institution: | (1) Department of Mathematics, University of Wisconsin, 53706 Wisconsin, Madison, U.S.A.;(2) Institute of Mathematics, Academia Sinica, Taipei, Taiwan, R.O.C. |
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Abstract: | The purpose of this paper is to justify an asymptotic method developed for the study of peristaltic transport in a tube of
arbitrary cross section. Within the framework of long wave approximation, the three-dimensional nonlinear Navier-Stokes equations
are reduced to a sequence of two-dimensional linear boundary value problems of Laplace and biharmonic operators. It is shown
that, if a Reynolds number is less than some constant, the solution of the approximate equations is indeed an asymptotic approximation
to the exact solution of the problem as the ratio of the maximum radius of the tube to the wave length of the peristaltic
motion of the wall tends to zero, and the error estimates are expressed inL
2 norms. Furthermore, under the same condition the exact solution is shown to be unique and stable under arbitrary perturbation
of spatially periodic disturbance. Application of the stability condition to peristaltic transport in a tube of circular cross
section is given. |
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Keywords: | |
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