ISSN:
1435-1528
Keywords:
Entrance pressure loss
;
abrupt contraction
;
power-law fluid
;
finite-element method
;
variational upper bound
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Abstract Finite-element results are presented for the extra pressure loss for a power-law fluid due to an abrupt contraction of ratio 2, 4, 8 and ∞ for both the axisymmetric and planar cases. Contrary to earlier results in the literature, it is found that the variational result of Duda and Vrentas forms a very good upper bound for the axisymmetric case, even for small values of the power-law index. This variational method has now been extended to the planar case, where it is again found to form a very good upper bound.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01332688
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