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Visualizing Mass Transport by Particle Advection in an In-Vitro Model of the Human Lung

机译：在人类肺体外模型中通过粒子对流可视化质量传输

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摘要

The method of backlight illumination (Fig. 1) is used to visualize the motion of particles within an in-vitro model of the human lung (Fig. 2). For this purpose small, neutrally buoyant particles are injected to the flow in the form of a bolus at the top end of the model trachea. Subsequently, an oscillating motion with amplitude below the dead space of the model is applied to the fluid in the branches. Nevertheless, particles pass the complete model and leave it through the open, lower (distal) ends of the bifurcations. The set-up in figure 1 shows the illumination technique of the particles by an LED whose light pulse of just lus duration is captured by a High - Speed camera (Photron APX RS) through a telecentric lens set-up. With an image resolution of 512×512 pixels of the camera a total number of 8190 images during 63 oscillating periods equivalent to 130 images per period are captured during each measurement. The single images are superposed for one measurement resulting in the probability distribution of particle positions as shown color coded in Fig. 3, red corresponds to high, blue to low particle probability.
机译：背光照明方法（图1）用于可视化人肺体外模型（图2）中颗粒的运动。为此，在模型气管的顶端以团注的形式将小的中性浮力颗粒注入到流中。随后，将振幅低于模型死空间的振荡运动应用于分支中的流体。不过，粒子会通过完整的模型，并使其通过分叉的开放，较低（远端）端。图1中的设置显示了LED的粒子照明技术，该LED的持续时间仅为光通量的光脉冲由高速相机（Photron APX RS）通过远心镜头设置捕获。使用相机的512×512像素的图像分辨率，在每次测量期间，在63个振荡周期内总共捕获了8190张图像，相当于每个周期130张图像。单个图像被叠加一次测量，导致粒子位置的概率分布，如图3彩色编码所示，红色对应于高概率，蓝色对应于低概率。

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  • 来源
    《Journal of visualization》 |2009年第2期|89-89|共1页
  • 作者

    Bauer K; Bruecker Ch;

  • 作者单位

    Institute of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Freiberg, Germany;

    Institute of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Freiberg, Germany;

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