估计流入弹性介质的界面透率
Zelai Xu1, Pengtao Yue2, James J Feng1,3
1Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada. james.feng@ubc.ca.
Soft matter
|June 27, 2024
概括
这项研究确定了多孔材料的界面透性,这对于在水凝和组织中精确的流体流动模拟至关重要. 它提供了一种评估这个参数的方法,增强了预测模型.
科学领域:
- 孔隙介质物理 孔隙介质物理
- 计算流体动力学的流体动力学.
- 材料科学 材料科学 材料科学
背景情况:
- 在多孔介质中建模流体流动是具有挑战性的,特别是对于像水凝这样的可变形多弹性材料.
- 现有的界面透性条件通常依赖于现象学参数.
- 准确的边界条件对于可靠的流体-固体相互作用模拟至关重要.
研究的目的:
- 为了确定面孔透性参数 (η) 弹性材料.
- 建立一种基于孔尺度特征的方法来评估 η.
- 为了在各种多弹性材料中实现更现实的流动模拟.
主要方法:
- 开发了使用固体圆柱体或平行孔的周期性阵列的孔尺度流量模型.
- 模拟流体通过这些理想化的多孔结构流动.
- 分析模拟结果,以导出界面透率 (η).
主要成果:
- 成功确定了界面透率 (η) 作为毛孔大小和毛孔度的函数.
- 提供了一种定量关系,用于评估 η.
- 验证了对一系列带弹性材料属性的方法.
结论:
- 该研究提供了一种基于物理的方法来确定界面透性,超越现象学参数.
- 这项工作使得可变形多孔介质中的流体流动模拟更加准确和现实.
- 这些发现适用于水凝,泡和生物组织,提高了它们的建模能力.
更多相关视频
11:14A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level
Published on: January 10, 2017
11.7K
09:32Mechanical Expansion of Steel Tubing as a Solution to Leaky Wellbores
Published on: November 20, 2014
12.2K
相关概念视频
01:17Steady, Laminar Flow Between Parallel Plates
171
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.
171
01:27Uniform Depth Channel Flow
67
Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...
67
01:23Steady, Laminar Flow in Circular Tubes
186
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...
186
01:22Couette Flow
243
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
243
01:18Uniform Depth Channel Flow: Problem Solving
61
To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
61
01:15Application of the Linear Momentum Equation
74
The application of the linear momentum equation can be used to analyze the forces needed to hold a 180-degree pipe bend in place with flowing water. In this case, water flows through the bend with a constant cross-sectional area of 0.01 square meters and a flow velocity of 15 meters per second. The pressure at the entrance is 0.2 Megapascals and the pressure at the exit is 0.16 Megapascals.
The goal is to determine the force components in the x and y directions to hold the pipe in place. Since...
The goal is to determine the force components in the x and y directions to hold the pipe in place. Since...
74