Table 1.

The summary of models used in this study as well as the number of parameters.

Model	Parameters	Number of independent parameters
cylinder + ball + sphere	$f_{\mathrm{stick}}$, $f_{\mathrm{ball}}$, $f_{\mathrm{sphere}}$, $D_{\mathrm{in}}^{\mid \mid }$, $D_{\mathrm{ball}}$, $R_{\mathrm{cylinder}}$, $R_{\mathrm{sphere}}$	6 ($f_{\mathrm{stick}}+f_{\mathrm{ball}}+f_{\mathrm{sphere}}=1$)
stick + ball + sphere	$f_{\mathrm{stick}}$, $f_{\mathrm{ball}}$, $f_{\mathrm{sphere}}$, $D_{\mathrm{in}}^{\mid \mid }$, $D_{\mathrm{ball}}$, $D_{\mathrm{0}}$, $R_{\mathrm{sphere}}$	5 ($f_{\mathrm{stick}}+f_{\mathrm{ball}}+f_{\mathrm{sphere}}=1$
		and $D_0=3\mu m^2/ms$)
stick + ball	$f_{\mathrm{stick}}$, $f_{\mathrm{ball}}$, $D_{\mathrm{in}}^{\mid \mid }$, $D_{\mathrm{ball}}$	3 ($f_{\mathrm{stick}}+f_{\mathrm{ball}}=1$)