Bernoulli correction to viscous losses. Radial flow between two parallel discs

Details Bernoulli correction to viscous losses. Radial flow between two parallel discs Bernoulli correction to viscous losses. Radial flow between two parallel discs

2008-09-08

arxiv.org/abs/0809.1309v1

Am. J. Phys. 76 (8), 730-737(2008)

Physics

Classical Physics

26 pages, 8 figures

Scientific paper

10.1119/1.2897290

For a massless fluid (density = 0), the steady flow along a duct is governed exclusively by viscous losses. In this paper, we show that the velocity profile obtained in this limit can be used to calculate the pressure drop up to the first order in density. This method has been applied to the particular case of a duct, defined by two plane-parallel discs. For this case, the first-order approximation results in a simple analytical solution which has been favorably checked against numerical simulations. Finally, an experiment has been carried out with water flowing between the discs. The experimental results show good agreement with the approximate solution.

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