相关实验视频

Updated: Jun 22, 2025

Manufacture of Concentrated, Lipid-based Oxygen Microbubble Emulsions by High Shear Homogenization and Serial Concentration

Manufacture of Concentrated, Lipid-based Oxygen Microbubble Emulsions by High Shear Homogenization and Serial Concentration

Published on: May 26, 2014

凯尔文-赫尔姆霍尔茨不稳定性是通过水力动力学化来实现快速高效乳化的一个关键特征

Žan Boček¹, Martin Petkovšek¹, Samuel J Clark²

¹Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia.

Ultrasonics sonochemistry

|June 29, 2024

概括

凯尔文-赫尔姆霍尔茨不稳定性驱动微通道中的油水乳化,通过创建分散油流的 vortices. 化泡崩进一步提炼了乳液,类似于声学方法.

科学领域:

流体动力学流体动力学
微流体学微流体学
物理化学物理化学

背景情况:

油水乳化在各种工业过程中至关重要.
了解微通道乳化机制是过程优化的关键.
液动力学化是一种新兴的乳液形成技术.

研究的目的:

调查凯尔文-赫尔姆霍尔茨不稳定性在微风里通道内的油水乳化中的作用.
阐明由水力动力空化驱动的滴滴形成和分散的机制.

主要方法:

在可见光和X射线下高速可视化.
实验是在一个有450微米喉尺寸的正方形微风里进行的.
分析空洞流失,旋形成和泡崩动态.

主要成果:

凯尔文 - 赫尔姆霍尔茨不稳定性诱导空洞脱落和 vortex 的形成.
旋使油流变形为波形,导致碎片化.
化泡崩分散较大的滴到更细的乳液中.

结论:

凯尔文-赫尔姆霍尔茨不稳定性是微通道中液态动力学化乳化的主要驱动因素.
这个过程类似于声学驱动乳液中的雷利-泰勒不稳定性.
这项研究提供了对微流体乳液生成机制的见解.

关键词:

这是一种乳液乳液.液动力学化 (Hydrodynamic cavitation) 是一种水力学化.凯尔文 - 赫尔姆霍尔茨不稳定性文图里微通道的微通道

更多相关视频

In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids

In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids

Published on: November 18, 2022

Synthesis of Phase-shift Nanoemulsions with Narrow Size Distributions for Acoustic Droplet Vaporization and Bubble-enhanced Ultrasound-mediated Ablation

Synthesis of Phase-shift Nanoemulsions with Narrow Size Distributions for Acoustic Droplet Vaporization and Bubble-enhanced Ultrasound-mediated Ablation

Published on: September 13, 2012

相关概念视频

Enthalpy of Solution

Enthalpy of Solution

There are two criteria that favor, but do not guarantee, the spontaneous formation of a solution:

Entropy and Solvation

Entropy and Solvation

The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...