Analytical studies of a time-fractional porous medium equation. Derivation, approximation and applications
arXiv:1409.1825 · doi:10.1016/j.cnsns.2015.01.005
Abstract
In this paper we investigate the porous medium equation with a fractional temporal derivative. We justify that the resulting equation emerges when we consider the waiting-time (or trapping) phenomenon that can happen in the medium. Our deterministic derivation is dual to the stochastic CTRW framework and can include nonlinear effects. With the use of the previously developed method we approximate the investigated equation along with a constant flux boundary conditions and obtain a very accurate solution. Moreover, we generalize the approximation method and provide explicit formulas which can be readily used in applications. The subdiffusive anomalies in some porous media such as construction materials have been recently verified by experiment. Our simple approximate solution of the time-fractional porous medium equation fits accurately a sample data which comes from one of these experiments.
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Cited by in corpus (7)
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- Second order scheme for self-similar solutions of a time-fractional porous medium equation on the half-line
- Fully discrete Galerkin scheme for a semilinear subdiffusion equation with nonsmooth data and time-dependent coefficient
- Compactly supported solution of the time-fractional porous medium equation on the half-line