双分散密纤维悬浮体的风病学
Monsurul Khan1, Ria D Corder1, Kendra A Erk2
1School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA. ardekani@purdue.edu.
Soft matter
|January 3, 2024
概括
这项研究验证了不同纤维大小的缩纤维悬浮的模型. 数字模拟和实验表明,纤维尺寸比和成分通过影响阻塞体积分数,显著影响悬浮粘度.
科学领域:
- 类风病学 类风病学 类风病学
- 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:
- 统一纤维悬浮的建模已经建立,但对于集中的,多面比系统的验证缺乏.
- 工业相关的悬浮剂通常含有不同长度和面积比的纤维,使形学预测变得复杂.
研究的目的:
- 为了验证直接的数值模拟 (DNS) 与双分散纤维悬浮的实验测量.
- 为了研究纤维面积比分布和组成对缩悬浮物的质性行为的影响.
主要方法:
- 在稳定的剪流中对双分散悬浮的直接数值模拟 (DNS).
- 使用控制的双分散尼龙纤维在牛顿流体中的悬浮粘度的实验测量.
主要成果:
- 在数值预测和实验测量粘度之间发现了良好的一致性.
- 风湿性行为受到大纤维与小纤维的大小比率以及大纤维体积分数的强烈影响.
- 增加的相对粘度与减少的阻塞体积分数相关.
结论:
- 该研究提供了一种经过验证的模型,用于预测缩双分散纤维悬浮物的类风学.
- 堵塞体积分数是一个关键参数,控制这些复杂的流体的质行为.
- 这些发现对于优化涉及纤维悬浮的工业流程至关重要.
相关概念视频
Colloids and Suspensions
1.8K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
1.8K
Colloids
17.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.5K
Types of Fluids
267
Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
267
Viscosity
5.9K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
5.9K
Centrifugation
2.3K
Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
2.3K


