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논문 기본 정보

자료유형
학술저널
저자정보
Indartono Y.S. (Graduate School of Science and Technology, Kobe University) Usui H. (Department of Chemical Science and Engineering, Kobe University) Suzuki H. (Graduate School of Science and Technology, Kobe University) Komoda Y. (Department of Chemical Science and Engineering, Kobe University)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제17권 제4호
발행연도
2005.1
수록면
157 - 164 (8page)

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Hydrodynamic characteristic of surfactant drag-reducing flows is still not fully understood. This work investigated the temperature and diameter effect on hydrodynamic characteristic of cationic surfactant drag reducing flows in pipes. Solution of oleyl bishydroxyethyl methyl ammonium chloride (Ethoquad O/12), 900 ppm, as a cationic surfactant and sodium salicylate (NaSal), 540 ppm, as a counter-ion was tested at 12, 25, 40, and $50^{\circ}C$ in pipes with diameter of 13, 25, and 40 mm. Drag reduction effectiveness of this surfactant solution was evaluated in 25 mm pipe from 6 to $75^{\circ}C$. Rheological characteristic of this solution was measured by stress control type rheometer with cone-and-plate geometry. Scale-up laws proposed by previous investigators were used to evaluate the flow characteristic of the solution. It was found that this surfactant solution has clear DR capability until $70^{\circ}C$. Result of this work suggested that temperature has a significant influence in changing the hydrodynamic entrance length of surfactant drag reducing flows. From rheological measurement, it was found that the solution exhibits Shear Induced Structure at all temperatures with different degree of peak viscosity and critical shear rate.

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