caa a22 4500 606197176 CHVBK 20210128100928.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00348-014-1868-4 doi (NATIONALLICENCE)springer-10.1007/s00348-014-1868-4 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 [Elektronische Daten] [T. Chevalier, S. Rodts, C. Chevalier, P. Coussot] 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 atseeing 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. Springer-Verlag Berlin Heidelberg, 2014 Chevalier T. Laboratoire Navier (UMR 8205 ENPC-IFSTTAR-CNRS), Université Paris-Est, Champs sur Marne, France aut Rodts S. Laboratoire Navier (UMR 8205 ENPC-IFSTTAR-CNRS), Université Paris-Est, Champs sur Marne, France aut Chevalier C. IFSTTAR, GERS, Université Paris-Est, Champs sur Marne, France aut Coussot P. Laboratoire Navier (UMR 8205 ENPC-IFSTTAR-CNRS), Université Paris-Est, Champs sur Marne, France aut Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-16 0723-4864 56:1<1 2015 56 348 https://doi.org/10.1007/s00348-014-1868-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-014-1868-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chevalier T. Laboratoire Navier (UMR 8205 ENPC-IFSTTAR-CNRS), Université Paris-Est, Champs sur Marne, France aut NATIONALLICENCE 700 1- Rodts S. Laboratoire Navier (UMR 8205 ENPC-IFSTTAR-CNRS), Université Paris-Est, Champs sur Marne, France aut NATIONALLICENCE 700 1- Chevalier C. IFSTTAR, GERS, Université Paris-Est, Champs sur Marne, France aut NATIONALLICENCE 700 1- Coussot P. Laboratoire Navier (UMR 8205 ENPC-IFSTTAR-CNRS), Université Paris-Est, Champs sur Marne, France aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/1(2015-01-01), 1-16 0723-4864 56:1<1 2015 56 348