Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Fluids
6 (1994), S. 700-709
ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The steady-state entry flow of an Oldroyd B fluid in a plane channel is treated by perturbation analysis. The model predicts entrance lengths shorter than those of a Newtonian fluid at moderate Reynolds and small elasticity parameter. Previously proposed boundary-layer approximations produce significant errors, so new boundary-layer approximations are proposed and are shown to agree with predictions based on the full governing equations at moderate Reynolds numbers. The viscoelastic stresses grow in magnitude as the elasticity parameter increases and become singular at a finite value of the elasticity parameter, due to a breakdown of the Oldroyd B model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.868309
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