Self-similar focusing in porous media: An explicit calculation

D. G. Aronson

doi:10.3934/dcdsb.2012.17.1685

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2012, Volume 17, Issue 6: 1685-1691. Doi: 10.3934/dcdsb.2012.17.1685

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Self-similar focusing in porous media: An explicit calculation

D. G. Aronson^1,

1.
Institute for Mathematics and its Applications, University of Minnesota, Minneapolis, MN 55455

Received: September 30, 2010

Revised: November 30, 2011

Published: August 2012

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Abstract

We consider a porous medium flow in which the material is initially distributed in the exterior of an empty region (a hole) and study the final stage of the hole-filling process as well as the initial stage of the post filling regime. It is known that in axially symmetric flow the hole-filling is asymptotically described by a self-similar solution which depends on a constant determined by the initial distribution. The post filling accumulation process is also locally described by a self-similar solution which in turn is characterized by a constant. In general, these constants must be found either experimentally or numerically. Here we present an example of a one-dimensional flow where the constants are obtained explicitly.

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Mathematics Subject Classification: Primary: 35K55, 76S05; Secondary: 35K15.

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References

[1]	S. B. Angenent and D. G. Aronson, The focussing problem for the radially symmetric porous medium equation, Comm. PDE, 20 (1995), 1217-1240.doi: 10.1080/03605309508821130.
[2]	S. B. Angenent and D. G. Aronson, Self-similarity in the post-focussing regime in porous medium flows, Euro. J. Appl. Math., 7 (1996), 277-285.
[3]	D. G. Aronson, The porous medium equation, in "Nonlinear Diffusion Problems" (Montecatini Terme, 1985), Lecture Notes in Mathematics, 1224, Springer, Berlin, (1986), 1-46.
[4]	D. G. Aronson and J. Graveleau, A self-similar solution to the focusing problem for the porous medium equation, Euro. J. Appl. Math., 4 (1993), 65-81.
[5]	G. I. Barenblatt, "Scaling, Self-Similarity, and Intermediate Asymptotics," With a foreword by Ya. B. Zeldovich, Cambridge Texts in Applied Mathematics, 14, Cambridge University Press, Cambridge, 1996.
[6]	G. I. Barenblatt, On some unsteady motions of a liquid or gas in a porous medium, Akad. Nauk SSSR Prikl. Mat. Meh., 16 (1952), 67-78.
[7]	Ph. Bénilan, M. G. Crandall and M. Pierre, Solutions of the porous medium equation in $\mathbfR^N$ under optimal conditions on initial values, Indiana U. Math. J., 33 (1984), 51-87.doi: 10.1512/iumj.1984.33.33003.
[8]	B. E. J. Dahlberg and C. E. Kenig, Nonnegative solutions of the porous medium equation, Comm. PDE, 9 (1984), 409-437.