Study of the Drag Reduction Effect for the Pipe Flow in Surfactant Solutions

2002 ◽  
Vol 2002.3 (0) ◽  
pp. 49-50
Author(s):  
Hiroshi WATANABE ◽  
Kazunori SORIMACHI ◽  
Tomiichi HASEGAWA ◽  
Takatsune NARUMI
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Surfactant Solutions ◽  
Reduction Effect

K-1213 Study of the Drag Reduction Effect for the Pipe Flow in Polymer and Surfactant Solutions

2001 ◽  
Vol II.01.1 (0) ◽  
pp. 89-90
Author(s):  
Hiroshi WATANABE ◽  
Kazunori SORIMACHI ◽  
Tomiichi HASEGAWA ◽  
Takatsune NARUMI
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Surfactant Solutions ◽  
Reduction Effect

The effect of the water component on the pipe flow movement drag reduction effect by the surfactant

2003 ◽  
Vol 2003 (0) ◽  
pp. 411-412 ◽  
Author(s):  
Toru NAKATA ◽  
Hideo INABA ◽  
Akihiko HORIBE ◽  
Naoto HARUKI ◽  
Kenji SATO
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Reduction Effect

Drag Reduction Effect of Turbulent Pipe Flow with Traveling Wavy Elastic Wall

2019 ◽  
Vol 2019 (0) ◽  
pp. OS1-10
Author(s):  
Seiya NAKAZAWA ◽  
Takaaki SHIMURA ◽  
Akihiko MITSUISHI ◽  
Kaoru IWAMOTO ◽  
Akira MURATA
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Turbulent Pipe Flow ◽  
Elastic Wall ◽  
Reduction Effect

A tracer dispersion study of the drag-reduction effect in a turbulent pipe flow

1971 ◽  
Vol 47 (2) ◽  
pp. 209-230 ◽  
Author(s):  
A. W. Bryson ◽  
Vr. Arunachalam ◽  
G. D. Fulford
Keyword(s):  
Molecular Weight ◽  
Drag Reduction ◽  
Pipe Flow ◽  
Viscous Sublayer ◽  
Turbulent Pipe Flow ◽  
Reduction Mechanism ◽  
Response Curves ◽  
Pipe Flows ◽  
Tracer Dispersion ◽  
Reduction Effect

Remarkable differences in dispersion of a tracer material injected into turbulent pipe flows of water and water containing as little as 2·5 parts per million by weight of a soluble high-molecular-weight drag-reducing polyoxyethylene additive have been measured. Analysis of the tracer response curves in terms of a simple one-parameter model shows that the observed results are compatible with a drag-reduction mechanism based on thickening of the viscous sublayer adjoining the wall. Other experiments, reported briefly, suggest that polymer adsorption on to the wall is responsible for this thickening.

scholarly journals 0318 Drag Reduction Effect of Surfactant Solutions in Slit Flows

2013 ◽  
Vol 2013 (0) ◽  
pp. _0318-01_-_0318-02_
Author(s):  
Akiomi USHIDA ◽  
Tomiichi HASEGAWA ◽  
Takatsune NARUMI
Keyword(s):  
Drag Reduction ◽  
Surfactant Solutions ◽  
Reduction Effect

Drag Reduction of Surfactant Solutions for an Enclosed Rotating Disk

1999 ◽  
Author(s):  
Satoshi Ogata ◽  
Keizo Watanabe
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Transition Point ◽  
Rotating Disk ◽  
Torque Measurement ◽  
Rotating Disks ◽  
Rotating Shaft ◽  
Surfactant Solutions ◽  
Circular Pipe Flow ◽  
Maximum Drag Reduction

Abstract Recently, many studies on surfactant solutions have been conducted for drag reduction in a circular pipe flow. However, currently there are very few studies on rotating disks in the solutions. In this study, drag reduction for an enclosed rotating disk in surfactant solutions was clarified experimentally. Experiments were carried out to measure the torque acting on one side of a rotating disk, using a torque measurement device located at the top of the rotating shaft. Test surfactant solutions were Ethoquad O/12 at concentrations of 50, 100 and 200ppm. The temperatures of solutions were 18°C and 28°C. The clearances between the disk and the stator were 10mm and 20mm. It was shown that the Reynolds number at the transition point increased with increasing concentration and temperature of these solutions. The maximum drag reduction ratio was about 41% in 200ppm Ethoquad O/12 solution at 28°C.

LDV Measurement of Turbulent Pipe Flow With Traveling Wavy Elastic Wall for Drag Reduction

2019 ◽  
Author(s):  
Seiya Nakazawa ◽  
Takaaki Shimura ◽  
Akihiko Mitsuishi ◽  
Kaoru Iwamoto ◽  
Akira Murata
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Reduction Rate ◽  
Streamwise Velocity ◽  
Turbulent Pipe Flow ◽  
Deformation Control ◽  
Wall Deformation ◽  
Maximum Drag Reduction ◽  
Reduction Effect ◽  
Ldv Measurement

Abstract Drag reduction effect by traveling wavy wall deformation control in turbulent pipe flow was experimentally investigated. From the visualization, we confirmed the downstream traveling wave although it was not uniform in the circumferential direction. When the frequency is 110 Hz, the wall deformation amplitude and the wavelength indicated that the effective values for drag reduction. The wavespeed is approximately effective values for drag reduction. As a result, the maximum drag reduction rate of 6.8 % is obtained. The result of a LDV measurement shows that the mean streamwise velocity gradient decreased near the wall by the control, which leads to drag reduction.

scholarly journals Study on Drag Reduction of Surfactant Solutions (Effects of Additives and Solvents on a Circular Pipe Flow)

2013 ◽  
Vol 79 (801) ◽  
pp. 879-887 ◽  
Author(s):  
Daigo NAKAMURA ◽  
Hiroshi TOCHIGI ◽  
Satoshi OGATA ◽  
Keizo WATANABE
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Circular Pipe ◽  
Surfactant Solutions ◽  
Circular Pipe Flow
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