Fig. 5.

Constitutive laws for the flow of cohesive granular media. Variation of the effective friction ($\mu$) (A) and the volume fraction ($\varphi$) (B) with the inertial number ($I$) for different values of the “effective” cohesion number ($C^{eff}$). The assembled data are obtained by varying $\theta \in \left(20^{○},34^{○}\right)$, $N_c/\left(mg\right)\in \left(\mathrm{0,200}\right)$, $k_n/\left(mg/d\right)\in \left(2\times 10^5,2\times 10^7\right)$, and $Q\in \left(0.94,8.70\right)$.