Abstract
Local velocity measurements of interstitial flow through porousmedia and observation of the local pore geometry, which strongly influencesthe flow field, are necessary in order to understand the transport mechanismin a porous system. In order to investigate the effect of pore geometry on theflow field in porous media, three-dimensional velocity measurements ofinterstitial flow through two porous samples with different pore geometrieshave been experimentally performed using magnetic resonance imaging (MRI). Theporous samples were made from cylindrical tubes in one case packed withcrushed glass particles and in the other spherical beads. Based on theobserved images of the porous samples, the porosity and pore sizedistributions as pore structure parameters were determined by image analysis.The two- and three-dimensional velocity vectors of the steady-state flow inthe void spaces of the crushed glass sample have been measured using aspin-echo sequence with tagging pulses. The obtained velocity maps show astrong non-uniform flow. In places, reversed flow is induced by the poregeometry. The effect of the mean flow velocity on the change in the flowpattern has been investigated in the mean flow velocity range from 3.84 to13.2 mm s-1. The frequency distribution of the axial velocity componentof the interstitial flows through the packed beads was broader than that ofthe crushed glass pack.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.