Fig. 5: Effect of cohesive forces encoded in the ϕ parameter on the macroscopic hopper flow in our DEM simulation.
From: Behaviors of lunar regolith simulants under varying gravitational conditions
A At low cohesion (ϕ < 0.001 Nm−1), the particles flow like a dry sand. B When ϕ is large (ϕ > 0.001 Nm−1), the grains are cohesive, and the hopper tends to clog.
