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相关概念视频

Surface Tension of Fluid01:22

Surface Tension of Fluid

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Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
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Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

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Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
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相关实验视频

Updated: Jan 2, 2026

Forming, Confining, and Observing Microtubule-Based Active Nematics
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Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

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阴性液晶流是由时间变化的活性表面定驱动的.

Seyed Reza Seyednejad1, Miha Ravnik1,2

  • 1Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia. seyed-reza.seyednejad@fmf.uni-lj.si.

Soft matter
|January 10, 2025
PubMed
概括

我们通过使用动态表面固来控制液晶细胞中的物质流. 这允许可调节的流量模式,如稳定或振荡,在光子学中具有潜在的应用.

科学领域:

  • 软物质物理学 软物质物理学
  • 流体动力学 流体动力学
  • 材料科学 材料科学 材料科学

背景情况:

  • 阴性液晶表现出复杂的流动行为.
  • 表面定条件显著影响流体动力学.
  • 控制这些流动对于先进的材料应用至关重要.

研究的目的:

  • 为了证明在阴性液体细胞中产生多样化的材料流动模式.
  • 调查时间可变的活性表面定在控制这些流量的作用.
  • 探索光子学和合成活性物质的潜在应用.

主要方法:

  • 在一个封闭的细胞内对被动阴性流体进行数值模拟.
  • 应用时间依赖的表面定与动态可变的轻松轴.
  • 分析由各种定驱动方向和阶段产生的流量模式.

主要成果:

  • 成功生成多种流动模式:无净流,振荡流,稳定流和脉冲流.
  • 流动模式取决于定驱动方向 (协转/反转) 和相对相位.
  • 流量大小可以通过电池厚度和定驱动频率进行调节.

结论:

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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

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相关实验视频

Last Updated: Jan 2, 2026

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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

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  • 时间可变的活性表面 anchoring 提供精确控制 nematic 液晶流程.
  • 这种控制机制为光子学和合成活性物质中的响应表面开辟了道路.
  • 这些发现为设计新型响应性材料和设备提供了基础.