In-Pipe Rheology and Mixing Characterisation using Electrical Resistance Sensing

Thomas D. Machin, Hsin-yu (kent) Wei, Richard W. Greenwood, Mark J.h. Simmons

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6 Citations (Scopus)
374 Downloads (Pure)


This paper presents a novel, in-line Electrical Resistance Rheometry (ERR) technique which is able to obtain rheological information on process fluids, in-situ, based on electrical resistance sensing. By cross-correlating fluctuations of computed conductivity pixels across and along a pipe, using non-invasive microelectrical tomography sensors, rheometric data is obtained through the direct measurement of the radial velocity profile. A range of simple, Newtonian and non-Newtonian fluids, have been examined with the obtained velocity profiles independently validated using Particle Image Velocimetry (PIV); results from both ERR and PIV techniques are in excellent agreement. Comparison of the rheological parameters obtained from ERR with off-line rheology measurements demonstrated that ERR was able to perform with an accuracy of 98% for both Newtonian and non-Newtonian fluids. The ERR technique presented offers new capabilities of true in-situ analysis of fluids relevant to formulated products and in-pipe spatial and temporal analyses afford the simultaneous interrogation of localised and global mixing behaviour.
Original languageEnglish
Pages (from-to)327-341
JournalChemical Engineering Science
Early online date9 May 2018
Publication statusPublished - 21 Sept 2018


  • in-line
  • Rheology
  • Non-Newtonian
  • Mixing
  • electrical resistance tomography


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