dp 1.21[mm] "粒径"
muf 2.98[P] "流体动力黏度"
Vav 44.87[cm/s] "平均通道速度"
d 11.2[mm] "通道宽度"
L d*1000 "通道长度"
rhof 1.178[g/cm^3] "流体和颗粒密度"