Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution

Japper-Jaafar, Azuraien and Escudier, Marcel and Poole, Robert (2009) Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution. J. Non-Newtonian Fluid Mech., 161. pp. 86-93.

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Abstract

Fully-developed turbulent pipe flow of an aqueous solution of a rigid “rod-like” polymer, scleroglucan, at concentrations of 0.005% w/w and 0.01% w/w has been investigated experimentally. Fanning friction factors were determined from pressure-drop measurements for the Newtonian solvent (water) and the polymer solutions and so levels of drag-reduction for the latter. Mean axial velocity u and complete Reynolds normal-stress data, i.e. u', v' and w', were measured by means of a laser Doppler anemometer at three different Reynolds numbers for each fluid. The measurements indicate that the effectiveness of scleroglucan as a drag-reducing agent is only mildly dependent on Reynolds number. The turbulence structure essentially resembles that of flexible polymer solutions which also lead to low levels of drag reduction.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Departments / MOR / COE: Departments > Mechanical Engineering
Depositing User: Azuraien Japper @ Jaafar
Date Deposited: 21 Sep 2010 00:33
Last Modified: 19 Jan 2017 08:25
URI: http://scholars.utp.edu.my/id/eprint/2449

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