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Article Dans Une Revue Desalination and Water Treatment Année : 2022

Effect of Reynolds number on turbulence characteristics of turbulent Ostwald de Waele fluids

Résumé

The current work aimed to understand how the Reynolds number affected the characteristics of turbulent power-law fluids. A fully developed large-eddy simulation of turbulent pseudoplastic and dilatant fluids over a straight pipe was performed numerically at three Reynolds numbers (4,000; 8,000 and 12,000) and flow behaviour indexes of (0.75, 1 and 1.4). The key findings indicated that when the Reynolds number rose, the creation of axial fluctuations close to the wall area was amplified significantly. This led to a notably improved kinetic energy of turbulent fluctuations across the radial direction. The mechanism of the velocity variations from the near-wall area towards the core region was enhanced with rising Reynolds numbers. This trend was more evident as the flow behaviour index dropped.
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Dates et versions

hal-04075423 , version 1 (07-06-2023)

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Mohamed Abdi, Meryem Ould-Rouiss, Lalia Abir Bouhenni, Nour Elhouda Beladjine, Belhouari Abdelkarim Bekhtaoui. Effect of Reynolds number on turbulence characteristics of turbulent Ostwald de Waele fluids. Desalination and Water Treatment, 2022, 279, pp.173 - 177. ⟨10.5004/dwt.2022.29105⟩. ⟨hal-04075423⟩
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