三维交叉裂隙渗流特性的实验和数值模拟研究

doi:10.13722/j.cnki.jrme.2015.0456

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Abstract Fracture intersection plays a basic role in fluid flow and solute transport through fracture networks because they allow different fluids to mix and disperse along the flow paths. An artificial three dimensional crossed fracture model is manufactured and a high-precision experimental system of fluid flow test was established. Numerical simulations by solving the Navier-Stokes equations were performed to investigate the fluid flow behavior through crossed fractures with different widths. The results show that the flow rate is quadratically related with the tested pressure drop，following the famous Forchheimers law. The Reynolds numbers(Re) of the tested results agree well with those of numerical simulations and theoretical solutions，indicating that both the experiments and simulations are reliable. This work suggests that the suitable width of fractures in a fracture model should be 8 times larger than the maximum hydraulic aperture of all fractures. The critical Re for the onset of nonlinear flow through crossed fractures is in the range of 12.33–61.67.

Key words： rock mechanics three-dimensional crossed fractures flow test Forchheimers law nonlinear flow Navier-Stokes equations

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	Articles by authors
	LIU Richeng1
	2
	LI Bo3
	JIANG Yujing1
	4
	YU Liyuan2

Cite this article:

LIU Richeng1,2,LI Bo3, et al. Experimental and numerical study of hydraulic properties of 3D crossed fractures[J]. , 2016, 35(S2): 3813-3821.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0456 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/3813

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