A new description of "diameter effect" in pipe flow of surfactant solutions

• Autorzy: Broniarz-Press L. , Różański J.
• Konferencja: Second International Conference on Engineering Rheology ICER 2003
• Języki publikacji: EN

Abstrakty

EN

On the basis of our experimental investigations it was found that proximate causes of an appearance of scale effect should be connected with rheological properties of surfactant solutions and especially with the critical value of shear rate above which the formation the fluid structure of SIS follows. If the value of critical shear rate becomes exceeded in the laminar range of flow, the system achieves the maximal drag reduction in a flow for a given surfactant solution. In case when it takes place in the turbulent range, at a given value of Reynolds number in the pipe of bigger diameter the smaller decrease of friction factor has been observed. We propose for description of "diameter effect" the relation between DR or DDR factors and dimensionless velocity wr.

Słowa kluczowe

EN

drag reduction; surfactant; diameter effect; rodlike micelle

PL

reologia; redukcja oporu; środek powierzchniowo czynny

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2003
• Tom: Vol. 8, no spec.
• Strony: 127--133
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Broniarz-Press L.

• Department of Chemical Engineering and Equipment, Faculty of Chemical Technology Poznań University of Technology, PL 60-965 Poznań, POLAND

autor

Różański J.

• Department of Chemical Engineering and Equipment, Faculty of Chemical Technology Poznań University of Technology, PL 60-965 Poznań, POLAND

Bibliografia

• [1] Broniarz-Press L. and Różański J. (2002): Regions of maximal drag reduction in straight pipe flow for the both polymer’s and surfactant’s Solutions. - Proceedings of the 6th European Conference on Rheology EURHEO 2002, Erlangen, September 1-6, pp.543-544.
• [2] Gasljevic K., Aguilar G. and Matthys E.F. (2001): On two distinct types of drag-reducing fluids, diameter scaling, and turbulent profiles. - J. Non-Newton. Fluid Mech., vol.96, No.3, pp.405-425.
• [3] Lu B., Li X., Zakin J.L. and Talmon Y. (1997): A non-viscoelastic drag reducing cationic surfactant system. - J. Non- Newton. Fluid Mech., vol.71, No. 1-2, pp.59-72.
• [4] Metzner A.B. and Reed J.C. (1955): Flow of non-Newtonian fluids - Correlation of the laminar, transition and turbulent-flow regions. - AIChE J., vol.l, No.4, pp.434-440.
• [5] Ohlendorf D., Interhal W. and Hoffmann H. (1986): Surfactant systems for drag reduction: physico-chemical properties and rheological behaviour. - Rheol. Acta, vol.25, No.5, pp.468-486.
• [6] Schmitt K., Brunn P.O. and Durst F. (1988): Scaling-up correlations for drag reducing surfactants. - Progress and Trends in Rheology II Supplement to Rheol. Acta, vol.27, pp.249-252.
• [7] Usui H., Itoh T. and Saeki T. (1998): On pipe diameter effects in surfactant drag-reducing pipe flow. - Rheol. Acta, vol.37, No.2, pp.122-128.