旋转器-静止器在动惯性状态下的乳化:试验对滴滴大小的强大的相关性进行实验
Roberta Campardelli1, Giulia De Negri Atanasio1, Claudia Carotenuto2
1Department of Civil, Chemical and Environmental Engineering, University of Genoa, Genoa 16145, Italy.
Langmuir : the ACS journal of surfaces and colloids
|December 6, 2023
概括
这项研究引入了一个新的模型来预测乳液中的油滴大小,这对于理解乳液稳定性至关重要. 开发的模型准确地量化了在转子-定子乳化过程中影响滴滴大小的力量.
科学领域:
- 合体和表面化学
- 流体动力学 流体动力学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 索特的平均直径 (d32) 是表征稳定的乳液的关键.
- 对于d32的现有型号,对于转子-定子系统缺乏特异性.
- 乳液表征仍然是一个活跃的研究领域.
研究的目的:
- 开发一种新的预测模型,用于油在水 (O-W) 乳液中正常化的索特平均直径 (d32).
- 研究粘性,惯性和界面张力对乳化作用的影响.
- 为了提供一个更准确的模型,旋转机-定子体乳化工艺.
主要方法:
- 应用一种新的基于 Π 定理的方法.
- 实验数据的多重回归分析.
- 使用石,大豆油和异氨基米酸O-W乳液进行测试.
主要成果:
- 为正常化d32开发了一种新的经验相关性.
- 该模型量化了关键力的影响和O/W比率.
- 与现有文献模型相比,新模型显示出更高的准确性.
结论:
- 拟议的模型为旋转机-定位器乳化提供了更高的预测准确性.
- 它提供了对控制滴水大小的力量的定量理解.
- 这项工作有助于正在进行的乳液表征研究.
相关概念视频
01:17Steady, Laminar Flow Between Parallel Plates
200
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.
200
01:23Steady, Laminar Flow in Circular Tubes
220
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is...
220
01:07Laminar and Turbulent Flow
8.6K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
8.6K
01:24Turbulent Flow
197
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
197
01:10Poiseuille's Law and Reynolds Number
6.6K
Any fluid in a horizontal tube can flow due to pressure differences—fluid flows from high to low pressure. The flow rate (Q) is the ratio of pressure difference and resistance through a horizontal tube. The greater the pressure difference, the higher the flow rate. The flow resistance is expressed as:
6.6K
01:30Typical Model Studies
361
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.
361