Jüngel, A., & Li, Y. (2025). Existence of global weak solutions to a Cahn–Hilliard cross-diffusion system in lymphangiogenesis. DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS, 45(1), 286–308. https://doi.org/10.3934/dcds.2024093
The global-in-time existence of weak solutions to a degenerate Cahn–Hilliard cross-diffusion system with singular potential in a bounded domain with no-flux boundary conditions is proved. The model consists of two coupled parabolic fourth-order partial differential equations and describes the evolution of the fiber phase volume fraction and the solute concentration, modeling the pre-patterning of lymphatic vessel morphology. The fiber phase fraction satisfies the segregation property if this holds initially. The existence proof is based on a three-level approximation scheme and a priori estimates coming from the energy and entropy inequalities. While the free energy is nonincreasing in time, the entropy is only bounded because of the cross-diffusion coupling.
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Research Areas:
Mathematical and Algorithmic Foundations: 50% Modeling and Simulation: 50%
