Anomaly of pressure drops of rod-like micelle surfactant solutions passing through small orifices
Anomaly of pressure drops of rod-like micelle surfactant solutions passing through small orifices
复制标题
棒状胶束表面活性剂溶液通过小孔的压降异常
DOI：
10.1016/j.expthermflusci.2015.07.024
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发表时间：
2016
影响因子：
3.2
通讯作者：
and Keiko Amaki
中科院分区：
文献类型：
--
作者：
Akiomi Ushida;Shotaro Murao;Tomiichi Hasegawa;Takatsune Narumi;and Keiko Amaki
研究了水和含有反离子的表面活性剂溶液在小孔流动中的流动特性。计算得到的水压降与N-S方程的数值预测值吻合较好。与水相比，摩尔浓度比为1.0时，表面活性剂溶液的压降较大。此外，在狭缝通道中观察到了一种异常的流动形态：当摩尔浓度比为1.0时，缝隙前存在不稳定的旋涡和非定常流动，而当摩尔浓度比为10.0时，狭缝通道内的流动为定常流动。由此可见，表面活性剂溶液的异常压降是由非定常流动引起的。
The flow properties of water and surfactant solutions mixed with counter ions were investigated in flows through small orifices. Good agreement between the resultant pressure drops of water and the numerical predictions of the Navier–Stokes equations was obtained. Compared with those of water, the pressure drops of surfactant solutions were larger for molar concentration ratios of 1.0. Moreover, an anomalous flow pattern was observed in the flows through a slot channel: an unstable vortex and unsteady flow were found before the slot for a molar concentration ratio of 1.0, whereas a steady flow pattern was observed for a molar concentration ratio of 10.0. Thus, we conclude that the anomalous pressure drops for surfactant solutions were caused by the unsteady flows.