Thermal Conduction in Deforming Isotropic and Anisotropic Granular Porous Media with Rough Grain Surface |
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Authors: | Roohollah Askari S Hossein Hejazi Muhammad Sahimi |
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Institution: | 1.Department of Earth Sciences,Utrecht University,Utrecht,The Netherlands;2.Department of Chemical Engineering,Delft University of Technology,Delft,The Netherlands |
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Abstract: | The measurement of fluid pressure inside pores is a major challenge in experimental studies of two-phase flow in porous media. In this paper, we describe the manufacturing procedure of a micro-model with integrated fibre optic pressure sensors. They have a circular measurement window with a diameter of 260 \(\upmu \hbox {m}\), which enables the measurement of pressure at the pore scale. As a porous medium, we used a PDMS micro-model with known physical and surface properties. A given pore geometry was produced following a procedure we had developed earlier. We explain the technology behind fibre optic pressure sensors and the procedure for integrating these sensors into a micro-model and demonstrate their utility for the measurement of pore pressure under transient two-phase flow conditions. Finally, we present and analyse results of single and two-phase flow experiments performed in the micro-model and discuss the link between small-scale fast pressure changes with pore-scale events. |
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