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首页> 外文期刊>The European physical journal, E. Soft matter >Origin of accelerated and hindered sedimentation of two particles in wet foam
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Origin of accelerated and hindered sedimentation of two particles in wet foam

机译：湿泡沫中两种颗粒的加速和受阻沉降的起源

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摘要

To explore the origin of interactional settling behaviors of multi-particles in wet foam, the sedimentation of two particles placed one above the other as well as placed side by side is studied. According to the average settling velocity in experiment and the average settling drag force of the two particles in numerical simulation, we show that the particles display accelerated sedimentation as placed one above the other while they display hindered sedimentation in the case of the ones positioned side by side. Furthermore, the evolution of structure and force parameters of the bubbles, such as T1 topological events, displacement vector and principal stress fields, shows that the reciprocal action between the foam and the settling particles placed side by side is more significant. The different levels of interplay for these two settling cases also give rise to the diverse changes of bubble pressure response. The bubble pressure component of the average drag force is higher for the particles placed side by side. Especially, for the first time, it reveals that these interactional sedimentation behaviors in the foam are mainly attributed to the changed pressure of bubbles caused by these settling particles at the mesoscopic level. The present results may suggest potential explanations to the cause of the complex accelerated or hindered sedimentation of more particles in wet foam.
机译：为了探讨湿泡沫中多颗粒的间隙沉降行为的起源，研究了一个放置在另一个颗粒的沉降以及并排放置的粒子。根据实验中的平均沉降速度和两个颗粒在数值模拟中的平均沉降拖曳力，我们表明颗粒显示出加速沉降，如在其侧面的情况下显示阻碍沉降的情况下方边。此外，诸如T1拓扑事件，位移载体和主应力场的气泡的结构和力参数的演变表明，泡沫和并排放置的沉降颗粒之间的往复作用更显着。这两个稳定病例的不同相互作用层面也产生了泡沫压力反应的多样化变化。平均拖动的气泡压力分量较高，使颗粒并排放置。特别是，首次揭示泡沫中的这些互动沉降行为主要归因于这些沉降颗粒在介术水平上引起的气泡的变化。本结果可能表明对湿泡沫中更多颗粒的复杂加速或受阻沉降的原因的潜在的解释。

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  • 作者

    Jing Zefeng; Feng Chenchen; Wang Shuzhong; Xu Donghai;

  • 作者单位

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn Key Lab Thermofluid Sci &

    Engn MOE Xian Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn Key Lab Thermofluid Sci &

    Engn MOE Xian Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn Key Lab Thermofluid Sci &

    Engn MOE Xian Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy &

    Power Engn Key Lab Thermofluid Sci &

    Engn MOE Xian Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 物理学;
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