A Quasi-3D Numerical Model for Grout Injection in a Parallel Fracture Based on Finite Volume Method

Table 6

Description of three models and average relative errors of the solution.

Model	Number of the grid cell	Size of grid cell (mm)	Total computing time (h)	Average relative errors (%)
				Diffusion radius	Pressure distribution	Velocity distribution
Quasi-3D model	2500	10	0.5	0.41	2.58	0.66
2 layers model	500064	1<△x <3.5	48	0.37	33.61	33.36
6 layers model	1500264	0.3<△x <2.1	432	0.38	6.70	5.36

Note: △x is the edge length of a grid cell.