Rheologica Acta

, Volume 37, Issue 2, pp 122–128

On pipe diameter effects in surfactant drag-reducing pipe flows

  • H. Usui
  • Takayasu Itoh
  • Takashi Saeki
ORIGINAL CONTRIBUTION

DOI: 10.1007/s003970050098

Cite this article as:
Usui, H., Itoh, T. & Saeki, T. Rheol. Acta (1998) 37: 122. doi:10.1007/s003970050098

Abstract

Remarkable power saving in a fluid transport system is possible if the surfactant drag reduction technology is used. Application of surfactant drag reduction to district heating and cooling systems has been investigated in the past. The establishment of the scale-up law in drag-reducing pipe flows is one of the most important problems in this application. Main purpose of this study is aimed to develop a reliable scale-up law in surfactant drag-reducing flows. As the basic data of surfactant solutions, both non-Newtonian viscosity and viscoelasticity were experimentally determined. A turbulent eddy diffusivity model based on the Maxwell model was employed to estimate the drag reduction of surfactant solutions. The predictions by the turbulence model developed in this study with proper rheological characteristics of surfactant solutions has resulted in a reliable estimation of the pipe diameter effect in surfactant drag-reducing flows over the pipe diameter range from 11 to 150mm.

Key words Drag reduction surfactant micelles turbulence pipe diameter effect 

Copyright information

© Steinkopff Verlag 1998

Authors and Affiliations

  • H. Usui
    • 1
  • Takayasu Itoh
    • 2
  • Takashi Saeki
    • 2
  1. 1.Department of Chemical Science and Engineering Kobe University 1-1 Rokkodai, Nada-ku Kobe 657 JapanJP
  2. 2.Department of Applied Chemistry and Chemical Engineering Yamaguchi University 2557 Tokiwadai, Ube 755 JapanJP

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