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

Jaafar, A 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
ID Code:7890
Deposited By: Azuraien Japper @ Jaafar
Deposited On:14 Aug 2012 03:09
Last Modified:19 Jan 2017 08:25

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