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Turbulence manipulation in pipe flow...

U-Kaew, Ananchai.

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Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water./
Author:	U-Kaew, Ananchai.
Description:	131 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6925.
Contained By:	Dissertation Abstracts International68-10B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3285740
ISBN:	9780549277477

Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water.
U-Kaew, Ananchai.

Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water. - 131 p.

Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6925.

Thesis (Ph.D.)--Lehigh University, 2007.

Turbulence in a pipe flow was manipulated by the introduction of swirl, polymers and nanoparticles. Flow characteristics were measured by means of instantaneous differential pressure measurement, and Laser Doppler Velocimetry (LDV). Experimental data reveal domination of swirl over polymer effects as evidenced by the fact that drag reduction by polymers is not as effective in swirling pipe flow. On the other hand, with polymers, pressure fluctuations are reduced in a broad range of swirl regimes. In the current sets of experiments, two swirling flow regimes were confirmed: low (sw < 2, jet-like profile) and high (sw > 2, wake-like profile) swirl regimes. Rankine vortex-like profiles were also observed where the vortex in the core region becomes enhanced with polymer addition. Suppression of turbulence near pipe wall was observed with the introduction of spherical and elongated nanoparticles. Experimental results also show that nanofluids are not candidates for drag reduction, but have the potential for heat transfer enhancement in pipe flow, possibly due to the effective change in properties of the fluid.

ISBN: 9780549277477Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water.
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020 $a 9780549277477
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100 1 $a U-Kaew, Ananchai. $3 1272214
245 1 0 $a Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water.
300 $a 131 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6925.
502 $a Thesis (Ph.D.)--Lehigh University, 2007.
520 $a Turbulence in a pipe flow was manipulated by the introduction of swirl, polymers and nanoparticles. Flow characteristics were measured by means of instantaneous differential pressure measurement, and Laser Doppler Velocimetry (LDV). Experimental data reveal domination of swirl over polymer effects as evidenced by the fact that drag reduction by polymers is not as effective in swirling pipe flow. On the other hand, with polymers, pressure fluctuations are reduced in a broad range of swirl regimes. In the current sets of experiments, two swirling flow regimes were confirmed: low (sw < 2, jet-like profile) and high (sw > 2, wake-like profile) swirl regimes. Rankine vortex-like profiles were also observed where the vortex in the core region becomes enhanced with polymer addition. Suppression of turbulence near pipe wall was observed with the introduction of spherical and elongated nanoparticles. Experimental results also show that nanofluids are not candidates for drag reduction, but have the potential for heat transfer enhancement in pipe flow, possibly due to the effective change in properties of the fluid.
590 $a School code: 0105.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0495
690 $a 0548
710 2 $a Lehigh University. $3 515436
773 0 $t Dissertation Abstracts International $g 68-10B.
790 $a 0105
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3285740