CSSE Seminar Series (CSSESS)
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Seminar
An Image Processing Approach to Determining Fluid Velocity Fields for Complex 2D Media.
Speaker: Philip Morrow.
Institute: School of Computing and Information Engineering, University of Ulster, Northern Ireland .
Time/Place: 10:00 AM, Wed, 3 Dec, in Room 031, Erskine Building.
Abstract
This talk will present a novel imaging approach to the computation of fluid flow velocities in (synthetic) porous rock. We first create a digital image with the desired combination of matrix and fracture porosity (figure 1). This image is then translated into a physical medium using either stereolithography or wire machining. The result is a flow cell comprising two transparent plates with a thin section of material, identical to the digital image of the medium, between them. In order to observe and measure fluid velocity, the flow cell is integrated in a purpose built experimental rig (figure 3) and a controlled flow of fluid, seeded with neutrally dense micro-particles, is induced. By back-illuminating the particles and acquiring temporally separated images of sub-areas of the medium, the local velocities can be determined at high-resolution. A combination of cross-correlation, adaptive thresholding and template matching techniques are used in computing the results.
The talk will describe the components of the complete machine vision system: illumination, image capture, adaptive control sub-system and the computation of the velocity fields. Recent experimental results will be presented.
Biography
View past or future seminars; or view the CSSESS Home Page.