A TVD-type method for 2D scalar Hamilton–Jacobi equations on unstructured meshes

In this paper, a TVD-type difference scheme which satisfies maximum principle is developed for 2D scalar Hamilton–Jacobi equations on unstructured triangular meshes. The main ideas are node-based approximations and derivative-limited reconstruction with quadratic interpolation polynomial. The solution's slope satisfies maximum principle. Numerical experiments are performed to demonstrate high-order accuracy in smooth fields and good resolution of derivative singularities. The new method is simpler than WENO.