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Research Papers: Fundamental Issues and Canonical Flows

Study of Oscillating Flow of Viscoelastic Fluid With the Fractional Maxwell Model

[+] Author and Article Information
Jiu-hong Jia1

State Key Laboratory of Vibration, Shock and Noise, Shanghai Jiaotong University, Shanghai 200240, Chinajhjia@sjtu.edu.cn

Hong-xing Hua

State Key Laboratory of Vibration, Shock and Noise, Shanghai Jiaotong University, Shanghai 200240, China

1

Corresponding author.

J. Fluids Eng 130(4), 041201 (Apr 01, 2008) (4 pages) doi:10.1115/1.2903517 History: Received May 20, 2007; Revised October 25, 2007; Published April 01, 2008

The oscillating flow of the viscoelastic fluid in cylindrical pipes has been applied in many fields, such as industries of petroleum, chemistry, and bioengineering. It is studied using the fractional derivative Maxwell model in this paper. The exact solution is obtained utilizing a simpler and more reasonable technique. According to this velocity solution, the time-velocity profile of one kind of viscoelastic fluid is analyzed. From analysis, it is found that the flow behaves like the Newton fluid when the oscillating frequency is low, and the flow reversal occurs when the oscillating frequency is high. Moreover, two series approximations for the velocity are obtained and analyzed for different model parameters. In one series approximation, the velocity is parabolic in profile, while in the other series approximation, the velocity presents three characteristics: (1) it is independent of radius and at the centerline is smaller than that of steady Poiseuille flow, (2) the phase lags about 90deg with respect to the imposed pressure gradient, and (3) the Richardson annular effect is found near the wall.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 1

Velocity distribution of an oscillating pipe flow at different instants within one period

Grahic Jump Location
Figure 2

Richardson annular effect (overshoot) of the velocity nearby the wall of the pipe in the oscillating pipe flow of a viscoelastic fluid with the fractional derivative Maxwell model

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