Investigation on Nonlinear Flow Behavior through Rock Rough Fractures Based on Experiments and Proposed 3-Dimensional Numerical Simulation

Table 3

Fitting coefficients and in the Forchheimer equation and corresponding critical Reynolds numbers.

Fracture aperture (mm)	Specimen S1			Specimen S2			Specimen S3			Specimen S4
	(10^8)	(10^13)		(10^8)	(10^13)		(10^8)	(10^13)		(10^8)	(10^13)
0.50	20.085	9.688	5.06	20.456	10.668	5.57	20.591	11.459	5.98	20.82	12.573	6.56
0.75	4.86	3.733	1.95	5.117	3.953	2.06	5.314	4.184	2.18	5.588	4.61	2.41
1.00	1.462	1.895	0.99	1.512	1.982	1.03	1.574	2.146	1.12	1.627	2.285	1.19
1.25	0.415	1.201	0.63	0.437	1.282	0.67	0.476	1.410	0.74	0.503	1.511	0.79