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相关概念视频

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 Between Parallel Plates01:17

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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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相关实验视频

Updated: Sep 9, 2025

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
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Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Published on: April 23, 2018

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蒙特卡洛模拟平台用于激光多普勒流量计

David Thompson1, Wietske Verveld1, Guillaume Lajoinie2

  • 1University of Twente, TechMed Centre, Biomedical Photonic Imaging Group, Enschede, The Netherlands.

Journal of biomedical optics
|August 28, 2025
PubMed
概括
此摘要是机器生成的。

一个新的无声波蒙特卡洛模拟器,MC-多普勒,准确地模拟了高分散生物样本中的透射激光多普勒流量计 (LDF) 的光传播.

关键词:
蒙特卡洛模拟人类牛奶激光多普勒流量计光散射单分散悬浮剂

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相关实验视频

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Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
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Published on: April 23, 2018

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科学领域:

  • 生物医学光学
  • 计算机建模
  • 流体动力学

背景情况:

  • 蒙特卡洛模拟对于模拟生物医学应用的杂介质中的光传播至关重要.
  • 现有的基于voxel的平台面临着曲线边界和有限的流量和散射特性定制的问题.
  • 通过传输激光多普勒流量测量 (LDF) 在高度分散的样本中未得到充分研究,尽管它对实验室芯片和线内流量传感具有相关性.

研究的目的:

  • 开发一个新的无声波蒙特卡洛模拟平台,MC-多普勒,用于高分散介质的透射LDF.
  • 通过比较模拟和实验多普勒功率光谱来验证模拟的准确性.

主要方法:

  • 使用单元向量和光线跟踪进行光传播的MC-多普勒.
  • 实现完全可定制的散射相函数和流量场.
  • 用玻璃管中的聚乙烯珠悬浮体在不同流量 (0-15毫升/分钟) 中测试平台.

主要成果:

  • 模拟和实验多普勒功率光谱显示散射系数高达5毫米-1.
  • 在10mm-1的散射系数附近观察到差异.

结论:

  • 通过MC-多普勒提供精确的光传播模拟.
  • 该平台对中等散射系数有效,在具有挑战性的生物流体应用中推进流量量化.