Abstract
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 language | English |
|---|---|
| Pages (from-to) | 3845-3853 |
| Number of pages | 9 |
| Journal | Chemical Engineering Science |
| Volume | 56 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1 Jun 2001 |
Keywords
- flow enhancement
- non-Newtonian flow
- oscillatory flow
- vibration
- CFD