Weakly breaking waves in the presence of surfactant micelles.
Weakly breaking waves in the presence of surfactant micelles.
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存在表面活性剂胶束时产生微弱的破波。
DOI：
10.1103/physreve.76.061201
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Duncan
中科院分区：
文献类型：
--
作者：
Xinan Liu;J. Duncan
实验研究了在清水和含有体积浓度高于临界胶束浓度（CMC）的可溶性表面活性剂的水中机械产生的弱破碎波。对于表面活性剂的情况，破碎剂在清洁水中形成表面张力主导的溢出破碎剂[波频率1.42至1.15 Hz，参见邓肯，J. Fluid Mech.379，191（1999）]，其范围从最高频率的溢出到最低频率的具有倾入微射流的翻转波。结果表明，这种行为是一致的，在一个纯液体中的波具有较低的表面张力比水，而不是水与表面活性剂单层。射流冲击波顶正面所产生的破碎面的几何特征的分析表明，一个补丁的更激烈的湍流表明增加的空气-海洋传输相比，清洁水的情况下。
Mechanically generated weakly breaking waves were studied experimentally in clean water and water with a soluble surfactant whose bulk concentration was above the critical micelle concentration (CMC). For the surfactant case, the breaker, which forms a surface-tension-dominated spilling breaker in clean water [wave frequencies 1.42 to 1.15Hz , see Duncan, J. Fluid Mech. 379, 191 (1999)], ranges from a spiller at the highest frequency to an overturning wave with a plunging microjet at the lowest frequency. It is shown that this behavior is consistent with that of a wave in a pure liquid with a lower surface tension than water rather than water with a surfactant monolayer. The analysis of the geometrical characteristics of the breaking surface generated by the jet impact on the front face of the wave crest indicates a patch of more violent turbulence suggesting an increase of air-sea transfer compared to the clean water case.