Abstract
We study the stability and monotonicity of a conservative difference scheme approximating an initial-boundary value problem for a porous medium equation with a quadratic nonlinearity under certain conditions imposed only on the input data of the problem. We prove a grid analog of the Bihari lemma, which is used to obtain a priori estimates for higher derivatives; these estimates are needed both in the proof of the continuous dependence of the solution on small perturbations in the input data and for the analysis of monotonicity in the nonlinear case. We show that, regardless of the smoothness of the initial condition, the higher derivatives can become infinite in finite critical time. We give an example in which there arises a runningwave solution, which justifies the theoretical conclusions.
Similar content being viewed by others
References
Matus, P. and Lemeshevsky, S., Stability and Monotonicity of Difference Schemes for Nonlinear Scalar Conservation Laws and Multidimensional Quasi-Linear Parabolic Equations, Comput. Methods Appl. Math., 2009, vol. 9, no. 3, pp. 253–280.
Matus, P., Stability of Difference Schemes for Nonlinear Time-Dependent Problems, Comput. Methods Appl. Math., 2003, vol. 3, no. 2, pp. 313–329.
Matus, P.P. and Chuiko, M.M., Investigation of the Stability and Convergence of Difference Schemes for a Polytropic Gas with Subsonic Flows, Differ. Uravn., 2009, vol. 45, no. 7, pp. 1053–1064.
Demidovich, V.B., On a Certain Stability Criterion for Difference Equations, Differ. Uravn., 1969, vol. 5, no. 7, pp. 1247–1255.
Samarskii, A.A., Teoriya raznostnykh skhem (Theory of Difference Schemes), Moscow: Nauka, 1977.
Author information
Authors and Affiliations
Additional information
Original Russian Text © P.P. Matus, 2010, published in Differentsial’nye Uravneniya, 2010, Vol. 46, No. 7, pp. 1011–1021.
Rights and permissions
About this article
Cite this article
Matus, P.P. Stability with respect to the initial data and monotonicity of an implicit difference scheme for a homogeneous porous medium equation with a quadratic nonlinearity. Diff Equat 46, 1019–1029 (2010). https://doi.org/10.1134/S0012266110070098
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0012266110070098