Experimental Study on Measurement of Drag Coefficient of Sandy Soil Nonlinear Vadose

Figure 5

The relationship between the drag coefficient a and the porosity n of each particle size class: (a) single particle size 0.1–0.25 mm, (b) single particle size 0.25–0.5 mm, (c) single particle size 0.5–1 mm, (d) single particle size 1–2 mm, and (e) single particle size 2–5 mm.

(a)

(b)

(c)

(d)

(e)