Experimental Observation of Differences in the Dynamic Response of Newtonian and Viscoelastic Fluids

Details Experimental Observation of Differences in the Dynamic Response of Newtonian and Viscoelastic Fluids Experimental Observation of Differences in the Dynamic Response of Newtonian and Viscoelastic Fluids

2003-02-25

arxiv.org/abs/physics/0302092v2

Phys. Rev. E 68, 046301 (2003).

Physics

Fluid Dynamics

5 pages, 4 Figures, paper to be published in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.68.046301

In this paper we present an experimental study of the dynamic responses of a Newtonian fluid and a Maxwellian fluid under an oscillating pressure gradient. We use laser Doppler anemometry in order to determine the velocity of each fluid inside a cylindrical tube. In the case of the Newtonian fluid, the dissipative nature is observed and the response obeys the Zhou and Sheng universality (PRB 39, 12027 (1989)). In the dynamic response of the Maxwellian fluid an enhancement at the frequencies predicted by the corresponding theory (PRE 58, 6323 (1998)) is observed.

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