Table 1 Physical properties of the flow simulation

Time step

Δt

0.005

s

Mesh size

Δx × Δy

5 × 5

m

Internal friction angle before collapse (calculated in Table 2)

φ_int

30

°

Basal friction angle after collapse

(calculated in Table 2)

φ_bed

15

°

Ratio of basal pore fluid pressure (calculated in Table 3)

λ

0.5

–

Gravity acceleration

g_z

9.8

m/s²