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两层液体Bénard-Marangoni对流的实验研究

Experimental investigation of Bénard-Marangoni convection of two-layer fluid

  • 摘要: 采用粒子图像测速技术(PIV)对两层流体Bénard-Marangoni对流进行了实验研究. 研究了各种不同厚度比下的临界对流模式,同时研究了在温差变大时向超临界对流模式转化过程. 实验结果表明,界面张力对各种对流模式的形成和转变具有重要的作用.

     

    Abstract: In this paper, the Bénard-Marangoni convection in the two-layerfluid is investigated experimentally with particle image velocimetry (PIV).Different convection patterns near the critical point are observed.Meanwhile, the transitions from critical convection to supercriticalconvection are studied when the temperature difference \Delta T is rampedslowly. The experimental results indicate that the interface tension playsan important role for the convective patterns near critical point and thetransition of the convection patterns of two-layer fluid.

     

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