IMECH-IR  > 国家微重力实验室
超临界Marangoni-Bénard对流波数分析
吴笛; 段俐; 康琦
Source Publication第七届全国流体力学学术会议论文摘要集
2012
Pages133-133
Conference Name第七届全国流体力学学术会议
Conference Date2012-11-12
Conference Place中国广西桂林
Abstract本文通过理论和实验研究底部均匀加热大宽厚比Marangoni-Benard对流的波数选择问题。通过红外热像仪观测液层在缓慢线性升温和降温过程中的表面温度场。并对红外图像进行2D-Fourier变换,分析温度场的频谱特征。发现真实涡胞的频谱是由基波和对应的谐波叠加而成。基波是由3个互成120°的波叠加,而高次谐波部分主要由两部分组成:与基波方向一致2次谐波波和与基波方向成30°的次谐波。实验发现随着温差的上升,谐波与基波的强度比经历了一个先增加后减小的过程,存在一个极大值点。同时发现涡胞尺寸经历了一个先减小后增大的过程,也就是基波的波数先增加后减小,并且也存在一个极大值点。实验表明这两个极值点是...
KeywordMarangoni-benard对流 超临界 D-fourier变换 斑图形成 波数选择
DepartmentNML微重力实验流体力学
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48378
Collection国家微重力实验室
Recommended Citation
GB/T 7714
吴笛,段俐,康琦. 超临界Marangoni-Bénard对流波数分析[C]第七届全国流体力学学术会议论文摘要集,2012:133-133.
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