A granular model for crowd motion and pedestrian flow

We study a granular model for congested crowd motion and pedestrian flow. Our approach is based on an approximation through a Hele-Shaw type equation involving a degenerate operator of p-Laplacian type and a linear drift, for which we prove existence and uniqueness using nonlinear semigroup methods and the doubling variables technique. Our main result shows that, as p → ∞, the weak solutions of the $p-$problem converge to a solution of the congested crowd motion problem.