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Study of capillary interaction between two grains: a new experimental device with suction control

机译：研究两种谷物之间的毛细相互作用：具有吸力控制的新型实验装置

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摘要

We investigated the behavior of a water liquid bridge formed between two grains. We mainly focused on tensile tests with suction control (capillary pressure). Theoretical and experimental studies are compared. A new experimental device involving suction control of the liquid bridge was developed specifically for this kind of test. Most of the liquid bridge variables and characteristics were measured by image analysis (gorge radius, volume, contact angles, filling angles). Capillary force was measured by differential weighting. Experimental conditions allows us to avoid viscous effects. Our experimental results were close to Young-Laplace equation solutions. The "gorge method", commonly used for calculating the capillary force, was also validated by our experiments. Liquid bridge rupture was studied and a new rupture criterion is proposed. This criterion depends on the grain radius, contact angle, surface tension and suction and was in agreement with the experimental results.
机译：我们研究了两个颗粒之间形成的水液桥的行为。我们主要专注于具有吸力控制（毛细管压力）的拉伸试验。比较理论和实验研究。针对这种测试，专门开发了一种新的涉及液桥吸力控制的实验装置。大多数液桥变量和特性通过图像分析（峡谷半径，体积，接触角，填充角）进行测量。毛细管力是通过微分加权来测量的。实验条件使我们避免了粘性效应。我们的实验结果接近于Young-Laplace方程解。我们的实验也验证了通常用于计算毛细作用力的“峡谷法”。研究了液桥断裂，提出了新的断裂准则。该标准取决于晶粒半径，接触角，表面张力和吸力，并且与实验结果一致。

著录项

  • 来源
    《Granular matter》 |2013年第1期|49-56|共8页
  • 作者

    J.-P. Gras; J.-Y. Delenne; M. S. El Youssoufi;

  • 作者单位

    LMGC, CNRS, Universite Montpellier 2, Montpellier, France;

    LMGC, CNRS, Universite Montpellier 2, Montpellier, France,MIST Laboratory, IRSN, CNRS UMR 5508, Universite Montpellier 2, Montpellier, France;

    LMGC, CNRS, Universite Montpellier 2, Montpellier, France,MIST Laboratory, IRSN, CNRS UMR 5508, Universite Montpellier 2, Montpellier, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    capillarity; liquid bridge; tensile test; suction; experimental device; rupture criterion;

    机译：毛细作用液桥拉伸试验吸力实验装置破裂标准;

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