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超临界Benard-Marangoni对流的非定常流
Alternative Title中国科学院力学研究所国家微重力实验室;
吴笛; 段俐; 康琦
Source Publication第八届全国流体力学学术会议论文摘要集
2014
Conference Name第八届全国流体力学学术会议
Conference Date2014-09-18
Conference Place中国甘肃兰州
AbstractBenard-Marangoni对流是水平液层在竖直温度梯度作用下由表面张力梯度引起的流动不稳定现象。当温差达到临界值时,液层会失稳流动,形成Benard涡胞对流,称为BenardMarangoni临界对流状态。临界对流状态是一种稳定的六边形涡胞的定常流动,而继续升高温差时,Benard-Marangoni进入超临界状态,在超临界状态下,流场经过转捩,进入了非定常流动。通过粒子图像测速法(PIV)、红外热像仪等实验方法,研究超临界状态流场的非定常流动,特别是亚涡胞、热流体波的出现条件以及流场结构。实验结果表明,当ε>10时,发现涡胞尺寸增大至饱和值后增长缓慢,此时涡胞会失稳,出现亚涡胞、热流体...
KeywordBenard-marangoni对流 超临界 非定常 湍流
DepartmentNML微重力实验流体力学
Funding Organization国家自然科学基金(11032011,11372328)资助
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/52062
Collection国家微重力实验室
Recommended Citation
GB/T 7714
吴笛,段俐,康琦. 超临界Benard-Marangoni对流的非定常流[C],2014.
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