Vibrational flow of non-Newtonian fluids

Nitin Deshpande, Mostafa Barigou

Research output: Contribution to journalArticle

44 Citations (Scopus)


The flow of a time-independent fluid through a vibrated tube is studied both numerically by CFD simulation and experimentally. The effects are studied for Newtonian and non-Newtonian fluids which obey Bingham plastic, power-law or Herschel-Bulkley behaviour. The superimposed mechanical oscillations have no effect on the flow of Newtonian fluids, bur can greatly influence that of shear-dependent fluids. Flow enhancement is obtained with shear-thinning fluids whereas flow reduction occurs when a shear-thickening fluid is vibrated. The effects of the various theological parameters are investigated, and the flow behaviour index emerges as the most influential. The enhancement is a function of both vibration frequency and amplitude, but the same enhancement is generated with different amplitude-frequency combinations that correspond to the same peak acceleration. The CFD predictions are in both qualitative and quantitative agreement with experimental measurements. (C) 2001 Elsevier Science Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)3845-3853
Number of pages9
JournalChemical Engineering Science
Issue number12
Publication statusPublished - 1 Jun 2001


  • flow enhancement
  • non-Newtonian flow
  • oscillatory flow
  • vibration
  • CFD


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