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Author(s): S. Liu, J. Liu & Q. Chen
Abstract:
In the study of the strength of soil/sand, and the cause of the incipience of debris
flow, it is important to monitor the distribution and the migration of ice and
water contents in such porous media.
To overcome the difficulty of “seeing”
through opaque soil, an experimental investigation was conducted to explore the
feasibility of non-intrusive monitoring of ice migration in porous media by using
electric capacitance tomography (ECT).
A ten-electrode sensor was made for
signal acquisition and OIOR method was used for image reconstruction.
The
distribution and penetration of ice in porous solids are displayed clearly by ECT
images.
ECT data were also validated against the temperature data measured by
thermocouples, and the feasibility of such ECT method is convincingly proven.
Keywords:
flow monitoring, flow in porous solids.
1 Introduction:
Ice penetration or melting in soil/sand (porous solids) can significantly alter the
stability of the solid matrix, which will affect the possibility of debris/rock flow.
Therefore, it is important to understand the relationship between ice penetration
or melting in soil and the corresponding change in the mechanical properties of
the soil.
However, it is difficult to monitor ice and water contents and their
migration in such porous media by conventional techniques, due to the limited
sensing accessibility, e.g.
opacity, of the solids.
Electrical Capacitance Tomography (ECT) is a recently developed nonintrusive
technique for visualizing the distribution of materials.
As an example,
...
Pages: 8
Size: 644 kb
Paper DOI: 10.2495/DEB080051
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