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Speaker
Description
Particle transport in rough natural fractures has seen diversified potentials and applications in environmental engineering and resource development engineering.
Despite intensive and outstanding research on their transport phenomena, the impact
of surface attachment and confined space of rough natural fractures on particle
transport remains poorly understood.
In this study, we constructed a 3D-printed rough fracture model to investigate
the transport behavior of micro-particles within the rough fracture. Here, we develop
a particle transport imaging system using silica micro-particles coated with
fluorescence material, in conjunction with a Particle Image Velocimetry (PIV) system.
We investigated the transport and settling behavior of fluorescent micro -particles in
several rough fracture models under different fluid injection rates, and fracture
roughness. The experimental results revealed that as the surface roughness of a
fracture increases, the particles tends to settle more rapidly near the entrance of the
fracture. This phenomenon substantially diminishes the lateral transport of the
particle within the fracture, leading to a swift accumulation and consequent plugging
at the entry of the fracture. Notably, even with a increased fluid injection rate, the
rough fracture are not entirely obstructed by the clogging of particles. The overall
findings will shed light on understanding clogging and deposition characteristics of
particles in subsurface rough natural fractures.
| Country | 中国 |
|---|---|
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