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

Abstract

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.

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

References in corpus (3)

• Non-Newtonian effects in the peristaltic flow of a Maxwell fluid
• Enhacement in the dymanic response of a viscoelastic fluid flowing through a longitudinally vibrating tube
• Phenomenological model of propagation of the elastic waves in a fluid-saturated porous solid with non-zero boundary slip velocity

Cited by in corpus (4)

• Electrokinetic oscillatory flow and energy conversion of viscoelastic fluids in microchannels: a linear analysis
• Measurements of the bulk and interfacial velocity profiles in oscillating Newtonian and Maxwellian fluids
• Time-averaged transport in oscillatory squeeze flow of a viscoelastic fluid
• Optimal behavior of viscoelastic flow at resonant frequencies