Non-Newtonian fluid flow in geological rough fractures: lubrication approximation versus direct 3D simulations - Archive ouverte HAL Access content directly
Conference Papers Year : 2020

Non-Newtonian fluid flow in geological rough fractures: lubrication approximation versus direct 3D simulations

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Abstract

We simulate non-Newtonian flow in rough fractures. Random aperture fields with isotropic spatial correlations are generated using an FFT-based algorithm. We first solve the flow with a finite-difference code based on the lubrication approximation for power law and Carreau rheologies (2D approach). We then solve a modified Navier-Stokes equation incorporating both rheologies, in the 3D fracture space (3D approach). The 2D approach's efficiency to predict the flow distribution in the fracture plane depends on the fracture closure and correlation length.
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Dates and versions

insu-03079016 , version 1 (17-12-2020)

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  • HAL Id : insu-03079016 , version 1

Cite

Alessandro Lenci, Yves Méheust, Vittorio Di Frederico. Non-Newtonian fluid flow in geological rough fractures: lubrication approximation versus direct 3D simulations. XXIII Computational Methods in Water Resources, Dec 2020, Stanford, United States. ⟨insu-03079016⟩
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