Approximation of viscous transport and conservative equations with one sided Lipschitz velocity fields

The aim of this work is to investigate semi-Lagrangian approximation schemes on unstructured grids for viscous transport and conservative equations with measurable coefficients that satisfy a one-sided Lipschitz condition.

To establish the convergence of the schemes, we exploit the characterization of the solution for these equations expressed in terms of measurable time-dependent viscosity solution and, respectively, duality solution.

We supplement our theoretical analysis with various numerical examples to illustrate the features of the schemes.