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@ARTICLE{Bentz:907029,
author = {Bentz, Jonas and Patel, Ravi A. and Benard, Pascal and
Lieu, Alice and Haupenthal, Adrian and Kröner, Eva},
title = {{H}ow {H}eterogeneous {P}ore {S}cale {D}istributions of
{W}ettability {A}ffect {I}nfiltration into {P}orous {M}edia},
journal = {Water},
volume = {14},
number = {7},
issn = {2073-4441},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2022-01817},
pages = {1110 -},
year = {2022},
abstract = {Wettability is an important parameter that significantly
determines hydrology in porous media, and it especially
controls the flow of water across the rhizosphere—the
soil-plant interface. However, the influence of spatially
heterogeneous distributions on the soil particles surfaces
is scarcely known. Therefore, this study investigates the
influence of spatially heterogeneous wettability
distributions on infiltration into porous media. For this
purpose, we utilize a two-phase flow model based on
Lattice-Boltzmann to numerically simulate the infiltration
in porous media with a simplified geometry and for various
selected heterogeneous wettability coatings. Additionally,
we simulated the rewetting of the dry rhizosphere of a sandy
soil where dry hydrophobic mucilage depositions on the
particle surface are represented via a locally increased
contact angle. In particular, we can show that hydraulic
dynamics and water repellency are determined by the specific
location of wettability patterns within the pore space. When
present at certain locations, tiny hydrophobic depositions
can cause water repellency in an otherwise well-wettable
soil. In this case, averaged, effective contact angle
parameterizations such as the Cassie equation are
unsuitable. At critical conditions, when the rhizosphere
limits root water uptake, consideration of the specific
microscale locations of exudate depositions may improve
models of root water uptake.},
cin = {IBG-3},
ddc = {690},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000781543600001},
doi = {10.3390/w14071110},
url = {https://juser.fz-juelich.de/record/907029},
}