Entrance Flows of Non‐Newtonian Fluids
作者:
J. L. Duda,
J. S. Vrentas,
期刊:
Transactions of the Society of Rheology
(AIP Available online 1973)
卷期:
Volume 17,
issue 1
页码: 89-108
ISSN:0148-6055
年代: 1973
DOI:10.1122/1.549297
出版商: The Society of Rheology
数据来源: AIP
摘要:
The creeping flow of a Powell‐Eyring fluid through a sudden tubular contraction is considered, and finite difference solutions of the vorticity transport and stream function equations are obtained for a range of contraction ratios, fluid properties, and apparent shear rates. Calculated axial velocity profiles, excess pressure drops, and separation effects at the 90° corner of the contraction are compared with theoretical results for Newtonian fluids and with experimental data for polymer solutions and melts. The results indicate a strong influence of nonlinear viscous effects on the magnitude of the excess entrance pressure loss and on the extent of the circulation pattern at the corner of the contraction.
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