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相关概念视频

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

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Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
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Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
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The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
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Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces
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按相场和利接口模型在动态湿中进行质量扩散和曲.

Tomas Fullana1,2, Stéphane Zaleski1,3, Gustav Amberg4

  • 1Sorbonne Université, Institut Jean le Rond d'Alembert, CNRS, F-75005 Paris, France.

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概括
此摘要是机器生成的。

这项研究引入了一种用于动态湿的新型利接口模型,该模型包含了接触线上的质量扩散. 该模型有效地解决了接触线奇点而没有经验性拟合,为流体动力学模拟提供了有效的替代方案.

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科学领域:

  • 流体动力学和接口科学 流体动力学和接口科学
  • 计算物理 计算物理

背景情况:

  • 经典的利接口模型由于无滑动条件而面临接触线奇点,通常需要经验性的纳维尔边界条件.
  • 阶段场模型自然通过质量扩散处理接触线动态,但可以是计算密集的.
  • 需要有效的利接口方法来捕获接触线上的扩散性质量传输.

研究的目的:

  • 开发一个计算效率高的利接口玩具模型,该模型包含接触线上的质量扩散.
  • 在没有经验参数拟合的情况下规范接触线奇点.
  • 为模拟动态湿现象提供一个实用的替代方案.

主要方法:

  • 从Cahn-Hilliard方程中开发了一个理论关系,将扩散式质量传输与墙壁曲率联系起来.
  • 在曲面接口上估计的化学潜力,以导出高度曲面区域的宽度 (δ) 和明显的接触角.
  • 在利接口框架内引入了一个虚构的边界,具有动态的表面接触角条件.

主要成果:

  • 玩具模型成功地在一个利的接口框架内在接触线上进行了大规模扩散.
  • 对相场模拟模型的模型验证显示,液体桥稳定状态和落差扩散瞬态的良好一致性.
  • 该模型提供了一种有效和实用的方法来解决接触线问题.

结论:

  • 拟议的利接口玩具模型通过整合质量扩散有效地解决了接触线奇点.
  • 这种方法为动态湿模拟提供了相场方法的计算成本较低的替代方案.
  • 模型的参数可以通过相场模拟得到信息,弥合方法之间的差距.