Mixing studies in unbaffled stirred tank reactor using electrical resistance tomography

Madhavi V. Sardeshpande*, Gaurav Kumar, T. Aditya, Vivek V. Ranade

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Unbaffled stirred tanks are extensively used in chemical process industries for variety of applications including semi-batch reactions. In un-baffled stirred tanks, impeller rotation generates a vortex and reactants are added into this vortex. There is a growing interest towards understanding the mixing performance of such unbaffled stirred vessels. The present work is aimed at providing experimental results on mixing time and solid particle distribution inside an unbaffled vessel using electrical resistance tomography (ERT). A methodology for using ERT for characterizing vortex and mixing in unbaffled stirred vessel was established. The ERT was used to measure the mixing time with and without solid particles (glass beads, 250. μm) in a stirred reactor. In this study, ERT technique was effectively applied for imaging solid-liquid flow and developed suitable data processing methodologies. It observed that estimated liquid phase mixing time for Un-baffled vessel was more as compared to baffled vessel. Radial solid concentration profiles showed Gaussian distribution inside the vessel. The presented methodology of using ERT and experimental results will be useful for designing and estimating mixing and solid distribution in unbaffled stirred tanks.

Original languageEnglish
Pages (from-to)110-121
Number of pages12
JournalFlow Measurement and Instrumentation
Early online date12 Jan 2016
Publication statusPublished - 01 Mar 2016
Externally publishedYes


  • ERT
  • Mixing time
  • Radial solid concentration
  • Unbaffled stirred tank

ASJC Scopus subject areas

  • Instrumentation
  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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