Strength of post-liquefaction flows - A speculative velocity dependant model

Many observations have shown that post-liquefaction flows exhibit enhanced mobility due to some form of partial fluidisation leading to more rapid motions and longer runout distances than might be otherwise expected. These phenomena may be explained by anticipating a reduction in frictional strength due to increasing velocity of flow. In this paper we investigate a simple model which manifests this effect. The model produces a rich variety of strength-velocity responses, including near complete loss of strength at high velocities.