二元工质Marangonl对流的实验研究与数值模拟
EXPERIMENTAL INVESTIGATION AND SIMULATION ON THE MARANGONI CONVECTION IN A BINARY MIXTURE
查看参考文献15篇
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文摘
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用实验和数值模拟方法研究了正值表面张力温度系数的二元醇类特殊水溶液Marangoni对流流动,首先通过实验测量确定正戊醇水溶液表面张力在特定的浓度分布和温度区间内具有明显随温度升高而增加的变化区域,然后利用特定浓度配比的正戊醇水溶液,采用PIV方法实验观测了矩形液池中二元工质液层在水平温差驱动下的Marangoni对流,发现了不同于常规的反向热毛细对流流动,测量的表面速度分布与相同工况的数值模拟结果进行了比较,发现二者变化趋势一致.实验观测和理论结果的比较进一步验证了表面张力温度系数为正值时二元工质液层的热毛细流动输运特性, |
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其他语种文摘
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A typical binary aqueous solution with positive surface tension-temperature gradient was experimentally and numerically studied.In this present paper,the surface tension of a 1-pentanol aqueous solution was found to grow with the increase of the temperature under specific concentration and temperature range.To verify this special phenomenon,flow fields of the 1-pentanol aqueous solution under different horizontal temperature gradients were visualized and measured in a rectangular cavity by means of PIV method.And an inverse Marangoni convection different from that in pure liquid layer was investigated.For comparison,a numerical simulation was carried out to obtain the velocity distribution along the free surface of the 1-pentanol aqueous solution layer under same horizontal temperature gradients.Both results obtained by the experimental observation and numerical simulation were found to display similar tendency. |
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来源
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力学学报
,2011,43(4):674-679 【核心库】
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关键词
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二元混合工质
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Marangoni对流
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表面张力
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PIV方法
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数值模拟
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地址
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1.
中国科学院力学研究所, 中国科学院微重力重点实验室, 北京, 100190
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北京交通大学机电学院, 北京, 100044
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0459-1879 |
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学科
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力学 |
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基金
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国家自然科学基金
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中国科学院力学研究所创新资助项目
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文献收藏号
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CSCD:4276534
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