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相关概念视频

General External Flow Characteristics01:26

General External Flow Characteristics

235
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...
235
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

243
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.
243
Laminar Flow01:27

Laminar Flow

1.1K
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:
1.1K

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相关实验视频

Updated: Jul 24, 2025

Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape
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表面工程双层织物用于连续的,被动的流体运输.

Mohammad Soltani1, Sudip Kumar Lahiri1, Sadaf Shabanian2

  • 1Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada. kevin.golovin@utoronto.ca.

Materials horizons
|July 6, 2023
PubMed
概括

这项研究引入了一种新的织设计,使用超疏水性涂料和有图案的可湿性通道来快速将汗水从皮肤上运送出去. 这种先进的织物确保了穿着者舒适,即使在潮湿的条件下,通过克服传统织品的局限性来确保穿着者的舒适.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 织工程 织工程 织工程
  • 生物医学工程 生物医学工程

背景情况:

  • 传统的织品将水分从皮肤中移除,以获得热生理学上的舒适性.
  • 在高湿度或多层磨损时,吸气效率显著下降,导致和.
  • 现有的方法在具有挑战性的环境条件下难以有效地去除液体.

研究的目的:

  • 开发一种新的流体传输织设计,利用结合的物理和化学可湿性模式.
  • 创建一种能够积极运输和去除汗水等液体的织物,提高佩戴者的舒适性.
  • 为了克服在和或高湿度环境中常规接表面的局限性.

主要方法:

  • 开发一种非有毒的,超疏水性织物涂层,可以保持空气透性.
  • 整合两个超疏水性织物层连接在一起的线程.
  • 在面料层的内侧/内侧的湿透通道的图案,用于定向流体传输.

主要成果:

  • 新的织设计可通过接方便液体运输到内部通道,保持干燥的外部表面.
  • 即使在高度潮湿的条件下,也可以实现定向流体传输.
  • 证明了流体运输速度大约是基于蒸发的方法的20倍.

结论:

  • 开发的织战略有效地运输和去除液体,增强热生理舒适度.
  • 这种设计比现有的管技术有了显著的改进,特别是在极端或潮湿的条件下.
  • 这些原则可以应用于消防员,执法人员和医疗保健工作人员等专业人员的个人防护套装.