% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@ARTICLE{Trinchero:1023830,
author = {Trinchero, Paolo and Zou, Liangchao and de La Iglesia,
Miquel and Iraola, Aitor and Bruines, Patrick and Deissmann,
Guido},
title = {{E}xperimental and numerical analysis of flow through a
natural rough fracture subject to normal loading},
journal = {Scientific reports},
volume = {14},
number = {1},
issn = {2045-2322},
address = {[London]},
publisher = {Macmillan Publishers Limited, part of Springer Nature},
reportid = {FZJ-2024-01832},
pages = {5587},
year = {2024},
abstract = {Fractured crystalline rocks have been chosen or are under
consideration by several countries as hostrock formations
for deep geological repositories for spent nuclear fuel. In
such geological formations,flow and solute transport are
mostly controlled by a network of connected natural
fractures, eachof them being characterised by internal
heterogeneity, also denoted as roughness. Fractures are,
inturn, subject to variable load caused by various factors,
such as the presence of thick ice sheets formedduring
glaciation periods. Understanding how coupled
hydro-mechanical (HM) processes affect flowand transport at
the scale of a single natural fracture is crucial for a
robust parameterisation of largescalediscrete fracture
network models, which are not only used for nuclear waste
disposal applicationsbut are also of interest to problems
related to geothermics, oil and gas production or
groundwaterremediation. In this work, we analyse and model
an HM experiment carried out in a single naturalfracture and
use the results of both, the experimental and the modelling
work, to get insights intofundamental questions such as the
applicability of local cubic law or the effect of normal
load onchanneling. The initial fracture aperture was
obtained from laser scanning of the two fracture surfacesand
an equivalent initial aperture was then defined by moving
the two fracture surfaces togetherand comparing the results
obtained using a Navier–Stokes based computational fluid
dynamics (CFD)model with the experimental flowrate obtained
for unloaded conditions. The mechanical effect of
thedifferent loading stages was simulated using a
high-resolution contact model. The different
computedfracture apertures were then used to run groundwater
flow simulations using a modified Reynoldsequation. The
results show that, without correction, local cubic law
largely overestimates flowrates.Instead, we show that by
explicitly acknowledging the difference between the
mechanical apertureand the hydraulic aperture and setting
the latter equal to 1/5 of the former, cubic law provides a
veryreasonable approximation of the experimental flowrates
over the entire loading cycle. A positivecorrelation between
fluid flow channeling and normal load is also found.},
cin = {IEK-6},
ddc = {600},
cid = {I:(DE-Juel1)IEK-6-20101013},
pnm = {1411 - Nuclear Waste Disposal (POF4-141)},
pid = {G:(DE-HGF)POF4-1411},
typ = {PUB:(DE-HGF)16},
pubmed = {38454042},
UT = {WOS:001185083700095},
doi = {10.1038/s41598-024-55751-w},
url = {https://juser.fz-juelich.de/record/1023830},
}