Characteristics of the flow of the surfactants solutions in the curved pipes

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

Abstrakty

EN

In this paper a number of flow experiments in curved tubes with aqueous solutions of the both, cationic and anionic, surface-active agents are presented. It has been shown that taking into account the flow criterion for power-law fluids by Metzner and Reed in the definition of modified Dean number for curved tube is more correct than the use of Reynolds number for clear solvent. The drag reduction in the coils was observed not only in the turbulent flow, but also in the pseudolaminar one. It has been stated that the curvature effect on friction factor for surfactant solutions exists below the critical value of modified Dean number. The value of is higher than this one characteristic for the clear solvent, and linearly increases when geometric modulus decreases.

Słowa kluczowe

EN

drag reduction; surfactant; curved pipe; rodlike micelle

PL

mechanika; 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: 135--139
• Opis fizyczny: Bibliogr. 10 poz., 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

autor

Dryjer S.

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

autor

Woziwodzki S.

• 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. (2000): Studies on the surface-active agents' Solutions flow in pipes. - Scientific Bulletin of Łódź Technical University, vol.47, No.27, pp.47-54.
• [2] Gasljevic K. and Matthys E.F. (1999): Improved quantification of the drag reduction phenomenon through turbulence reduction parameters. - J. Non-Newton. Fluid Mech., vol.84, pp.123-130.
• [3] 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.
• [4] 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.
• [5] Srinivasan P.S., Nandapurkar S.S. and Holland F.A. (1970): Trans. Inst. Chem. Engrs., vol.48, pp.156, from Walkowiak J. (1984).
• [6] Walkowiak J. (1984): Friction factors in coils for chosen fluids. - Ph.D. Thesis, Poznań University of Technology.
• [7] Weber M., Steiff A.S. and Weinspach P.M. (1991): Warmeubergang und Druckverlust wasseriger Tensidlosungen in Rohrwendeln (Heat transfer and pressure loss in flow of surfactant Solutions in coiled pipes). - Forschung im Ingenieurwesen, vol.57, No.4, pp. 112-118.
• [8] White C.M. (1929): Streamline flow through curved pipes. - Proc. Rey. Soc., vol.A123, pp.645-663.
• [9] White A. (1967): Flow characteristics of complex soap systems. - Nature, vol.214, No.6, pp.585-586.
• [10] Wojs K. (1994): Mechanism of the Toms phenomenon. - Chemical and Process Engineering, vol.l5, No.2, pp.271-280.