Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution
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 t...
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my.utp.eprints.78902017-01-19T08:25:43Z Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution Jaafar, A Escudier, Marcel Poole, Robert TJ Mechanical engineering and machinery 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. 2009 Article PeerReviewed application/pdf http://eprints.utp.edu.my/7890/1/JNNFM_published.pdf 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. http://eprints.utp.edu.my/7890/ |
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TJ Mechanical engineering and machinery Jaafar, A Escudier, Marcel Poole, Robert Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
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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. |
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Article |
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Jaafar, A Escudier, Marcel Poole, Robert |
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Jaafar, A Escudier, Marcel Poole, Robert |
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Jaafar, A |
title |
Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
title_short |
Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
title_full |
Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
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Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
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Turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
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turbulent pipe flow of a drag reducing, rigid “rod-like” polymer solution |
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2009 |
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http://eprints.utp.edu.my/7890/1/JNNFM_published.pdf http://eprints.utp.edu.my/7890/ |
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