Multicontinuum Modeling of Time-Fractional Diffusion-Wave Equation in Heterogeneous Media
Abstract
This paper considers a time-fractional diffusion-wave equation with a high-contrast heterogeneous diffusion coefficient. A numerical solution to this problem can present great computational challenges due to its multiscale nature. Therefore, in this paper, we derive a multicontinuum time-fractional diffusion-wave model using the multicontinuum homogenization method. For this purpose, we formulate constraint cell problems considering various homogenized effects. These cell problems are implemented in oversampled regions to avoid boundary effects. By solving the cell problems, we obtain multicontinuum expansions of fine-scale solutions. Then, using these multicontinuum expansions and supposing the smoothness of the macroscopic variables, we rigorously derive the corresponding multicontinuum model. Finally, we present numerical results for two-dimensional model problems with different time-fractional derivatives to verify the accuracy of our proposed approach.
Keywords
Cite
@article{arxiv.2502.09428,
title = {Multicontinuum Modeling of Time-Fractional Diffusion-Wave Equation in Heterogeneous Media},
author = {Huiran Bai and Dmitry Ammosov and Yin Yang and Wei Xie and Mohammed Al Kobaisi},
journal= {arXiv preprint arXiv:2502.09428},
year = {2025}
}