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相关概念视频

Laminar Flow01:27

Laminar Flow

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Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
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Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

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In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
The orifice meter is a simple,...
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Couette Flow01:22

Couette Flow

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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...
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Design Example: Flow of Oil Through Circular Pipes01:25

Design Example: Flow of Oil Through Circular Pipes

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Understanding fluid flow behavior through pipes is critical in fluid mechanics, especially in applications like oil transportation through pipelines. Hagen-Poiseuille's law provides an exact solution derived from the Navier-Stokes equations for steady, incompressible, and laminar flow within a circular pipe. Hagen-Poiseuille's law helps determine the necessary pressure drop across a pipeline section by determining parameters like pipe length, radius, oil viscosity, and the desired volumetric...
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General External Flow Characteristics01:26

General External Flow Characteristics

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The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
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Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

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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.
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Artificial Lung Device Priming for In Situ Fiber Bundle Surface Grafting
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[流量转换器设备的涂层技术]

Kazuhiko Ishihara1

  • 1Division of Materials and Manufacturing Science, Graduate School of Engineering, The University of Osaka.

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PubMed
概括
此摘要是机器生成的。

流量转移器 (FD) 通过重定向血流来治疗脑动脉瘤. 新的生物相容涂层旨在减少凝血,可能允许单抗血小板治疗和扩大治疗选择.

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科学领域:

  • 生物材料科学 生物材料科学
  • 医疗设备工程 医疗设备工程
  • 血管外科 血管外科

背景情况:

  • 流量转移器 (FD) 设备是脑动脉瘤的标准,重定向流量以防止破裂.
  • 目前的FD治疗需要双重抗血小板治疗 (DAPT),增加出血风险.
  • 减少DAPT的必要性对于更广泛的FD应用至关重要,特别是在破裂动脉瘤中.

研究的目的:

  • 审查2 - 甲基 ?? 烯酸 (MPC) 聚合物在增强FD生物相容性的潜力.
  • 探索MPC聚合物涂层如何减轻与FD相关的血栓栓塞风险.
  • 评估FD治疗的单抗血小板治疗的长期目标.

主要方法:

  • 对FD技术和抗血小板疗法现有文献的审查.
  • 分析MPC聚合物的界面特性和血红相容性.
  • 检查MPC聚合物整合到FD设备中,以改善生物反应.

主要成果:

  • FDs有效地降低了动脉内的压力,促进了愈合,但存在血栓栓塞的风险.
  • 模仿细胞膜脂的MPC聚合物表现出极好的血液兼容性.
  • 在医疗器械上,MPC涂层在抑制凝血和改善内皮质化方面表现有前途.

结论:

  • MPC聚合物涂层是提高FD生物相容性的有希望的策略.
  • 这一创新可能会导致对DAPT的依赖减少,从而最大限度地降低出血风险.
  • 该开发旨在将FD的使用扩展到更广泛的患者群体中,包括患有破裂动脉瘤的患者.