Quantitative exploitation of PFG NMR and MRI velocimetry data for the rheological study of yield stress fluid flows at macro- and micro-scales in complex geometries - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Experiments in Fluids Année : 2015

Quantitative exploitation of PFG NMR and MRI velocimetry data for the rheological study of yield stress fluid flows at macro- and micro-scales in complex geometries

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T. Chevalier
  • Fonction : Auteur
Stéphane Rodts
Philippe Coussot
  • Fonction : Auteur
  • PersonId : 1101142

Résumé

We explore the use of magnetic resonance imaging (MRI) velocimetry and pulsed field gradient nuclear magnetic resonance (PFG NMR) data for studying the flow characteristics of yield stress fluids through model pores (a succession of ducts of different diameters) or real porous media (bead packings). We propose different methods for the quantitative analysis of the velocity field, aimed at getting a deep understanding of the different flow regimes (solid and liquid) which typically take place in such fluids and at seeing how the transition from one to the other occurs in space or in time. Our approach exemplifies interdependences between PFG NMR data and local flow features and how the statistical velocity distribution function obtained by this way can be used and/or processed for extracting quantitative information concerning critical flow characteristics at a local scale. This provides a solid framework of analysis of flows through porous media with pores much smaller than the resolution of MR velocimetry.
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Dates et versions

hal-01157337 , version 1 (27-05-2015)

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Citer

T. Chevalier, Stéphane Rodts, C. Chevalier, Philippe Coussot. Quantitative exploitation of PFG NMR and MRI velocimetry data for the rheological study of yield stress fluid flows at macro- and micro-scales in complex geometries. Experiments in Fluids, 2015, 56 (1), pp.1868-1868. ⟨10.1007/s00348-014-1868-4⟩. ⟨hal-01157337⟩
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