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相关概念视频

Fluid Pressure over Curved Plate of Constant Width01:12

Fluid Pressure over Curved Plate of Constant Width

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When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
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Fluid Pressure over Flat Plate of Variable Width01:02

Fluid Pressure over Flat Plate of Variable Width

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When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
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Fluid Pressure over Flat Plate of Constant Width01:05

Fluid Pressure over Flat Plate of Constant Width

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When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
The resultant force...
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Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

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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...
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Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

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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...
166
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

147
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.
147

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相关实验视频

Updated: Jun 11, 2025

Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
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使用COMSOL的三叶甲状腺膜的流体结构相互作用模拟.

Xiaoyang Xu1, Jie Cheng1

  • 1School of Computer Science and Technology, Xi'an University of Science and Technology, Xi'an, China.

Computer methods in biomechanics and biomedical engineering
|October 1, 2024
PubMed
概括
此摘要是机器生成的。

模拟大动脉 (AV) 是复杂的. 这项研究使用COMSOL来建模AV流体结构相互作用,发现材料特性在健康状态下对AV血液动力学影响最小.

关键词:
大动脉门的大动脉门科姆索尔 (COMMSOL) 是一个国家.流体结构相互作用.材料属性 材料的属性机械行为 机械行为

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科学领域:

  • 生物医学工程 生物医学工程
  • 计算流体动力学的流体动力学.
  • 医疗设备模拟 医疗设备模拟

背景情况:

  • 由于复杂的几何形状和多物理相互作用,大动脉 (AV) 模拟存在重大挑战.
  • 了解AV的机械行为对于诊断和治疗心血管疾病至关重要.

研究的目的:

  • 使用COMSOL.开发一个3D流体结构相互作用 (FSI) 的大动脉的模型.
  • 研究材料特性对健康的大动脉的机械行为和血液动力学的影响.

主要方法:

  • 通过使用COMSOL Multiphysics建立了一个三维的,三片叶子的大动脉流体结构相互作用模型.
  • 该模型模拟了AV在健康条件下的机械行为,重点关注材料性质变化.

主要成果:

  • 大动脉壁材料模型的变化对大动脉的血液动力学产生了很小的影响.
  • 发现AV传单的线性弹性特性限制了门的打开和关闭动态.
  • 选择的材料模型有助于在材料变形范围内快速评估AV性能.

结论:

  • 该研究成功开发并使用了一种AV FSI模型来评估物质财产影响.
  • 大动脉壁材料的特性对健康个体的AV血液动力学有有限的影响.
  • 线性弹性传单模型虽然具有限制性,但可以有效评估AV性能.