Numerical Simulation Study on Root Stones Loss in Dam Buttress Engineering

Table 1

Test conditions and drag force.

Simulation time (s)	Water depth (m)	Block size (m)	Average velocity (m/s)	Drag force (N)		Percentage of error
				Experimental value	Simulated value
360	0.25	0.04×0.04×0.04	0.25	0.053	0.057	4.15%
			0.35	0.098	0.102
			0.45	0.145	0.166
			0.55	0.211	0.240
			0.65	0.307	0.335