scholarly journals Pore‐Scale Hydrodynamics in a Progressively Bioclogged Three‐Dimensional Porous Medium: 3‐D Particle Tracking Experiments and Stochastic Transport Modeling

2018 ◽  
Vol 54 (3) ◽  
pp. 2183-2198 ◽  
Author(s):  
M. Carrel ◽  
V. L. Morales ◽  
M. Dentz ◽  
N. Derlon ◽  
E. Morgenroth ◽  
...  
Keyword(s):  
Porous Medium ◽  
Particle Tracking ◽  
Three Dimensional ◽  
Transport Modeling ◽  
Pore Scale ◽  
Stochastic Transport

3-D Microscopic Measurement and Analysis of Chemical Flow and Transport in Porous Media

1996 ◽  
Vol 118 (3) ◽  
pp. 470-480 ◽  
Author(s):  
Mehdi Rashidi ◽  
Andrew Tompson ◽  
Tom Kulp ◽  
Loni Peurrung
Keyword(s):  
Porous Medium ◽  
Three Dimensional ◽  
Pore Geometry ◽  
Pore Scale ◽  
Volume Data ◽  
Geometric Flow ◽  
Particle Volume ◽  
Flow And Transport ◽  
Solute Fluxes ◽  
Microscopic Measurement

Chemical flow and transport have been studied at the pore-scale in an experimental porous medium. Measurements have been taken using a novel nonintrusive fluorescence imaging technique. The experimental setup consists of a cylindrical column carved out of a clear plastic block, packed with clear beads of the same material. A refractive index-matched fluid was pumped under laminar, slow-flow conditions through the column. The fluid was seeded with tracer particles or a solute organic dye for flow and chemical transport measurements, respectively. The system is automated to image through the porous medium for collecting microscopic values of velocity, concentration, and pore geometry at high-accuracy and high-resolution. Various geometric, flow, and transport quantities have been obtained in a full three-dimensional volume within the porous medium. These include microscopic (pore-scale) medium geometry, velocity and concentration fields, dispersive solute fluxes, and reasonable estimates of a representative elementary volume (REV) for the porous medium. The results indicate that the range of allowable REV sizes, as measured from averaged velocity, concentration, and pore volume data, varies among the different quantities, however, a common overlapping range, valid for all quantities, can be determined. For our system, this common REV has been estimated to be about two orders of magnitude larger than the medium’s particle volume. Furthermore, correlation results show an increase in correlation of mean-removed velocity and concentration values near the concentration front in our experiments. These results have been confirmed via 3-D plots of concentration, velocity, pore geometry, and microscopic flux distributions in these regions.

THREE-DIMENSIONAL NATURAL CONVECTION IN A POROUS MEDIUM ENCLOSED WITH CONCENTRIC INCLINED CYLINDERS

1982 ◽  
Author(s):  
Yasuyuki Takata ◽  
K. Fukuda ◽  
Shu Hasegawa ◽  
Kengo Iwashige ◽  
H. Shimomura ◽  
...  
Keyword(s):  
Porous Medium ◽  
Natural Convection ◽  
Three Dimensional

scholarly journals Wetting front dynamics in an isotropic porous medium

2012 ◽  
Vol 694 ◽  
pp. 399-407 ◽  
Author(s):  
Yulii D. Shikhmurzaev ◽  
James E. Sprittles
Keyword(s):  
Porous Medium ◽  
Incompressible Liquid ◽  
Porous Matrix ◽  
Viscous Incompressible Liquid ◽  
Pore Scale ◽  
Wetting Front ◽  
Model Case ◽  
New Approach ◽  
Threshold Phenomena ◽  
Front Dynamics

AbstractA new approach to the modelling of wetting fronts in porous media on the Darcy scale is developed, based on considering the types (modes) of motion the menisci go through on the pore scale. This approach is illustrated using a simple model case of imbibition of a viscous incompressible liquid into an isotropic porous matrix with two modes of motion for the menisci, the wetting mode and the threshold mode. The latter makes it necessary to introduce an essentially new technique of conjugate problems that allows one to link threshold phenomena on the pore scale with the motion on the Darcy scale. The developed approach (a) makes room for incorporating the actual physics of wetting on the pore scale, (b) brings in the physics associated with pore-scale thresholds, which determine when sections of the wetting front will be brought to a halt (pinned), and, importantly, (c) provides a regular framework for constructing models of increasing complexity.

Three-dimensional mass transport modeling of pharmaceuticals adsorption inside ZnAl/biochar composite

2021 ◽  
Vol 614 ◽  
pp. 126170
Author(s):  
Jaime Moreno-Pérez ◽  
Paola S. Pauletto ◽  
Anaelise M. Cunha ◽  
Ádrian Bonilla-Petriciolet ◽  
Nina P.G. Salau ◽  
...  
Keyword(s):  
Mass Transport ◽  
Three Dimensional ◽  
Transport Modeling ◽  
Mass Transport Modeling
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