  In this paper, we focus on finite volume approximation schemes to solve a
non-local material flow model in two space dimensions. Based on the numerical
discretisation with dimensional splitting, we prove the convergence of the
approximate solutions, where the main difficulty arises in the treatment of the
discontinuity occurring in the flux function. In particular, we compare a
Roe-type scheme to the well-established Lax-Friedrichs method and provide a
numerical study highlighting the benefits of the Roe discretisation. Besides,
we also prove the L1-Lipschitz continuous dependence on the initial datum,
ensuring the uniqueness of the solution.
