Visualizing particle/flow structure interactions in the small bronchial tubes.
Particle deposition in the small bronchial tubes (generations six through twelve) is strongly influenced by the vortex-dominated secondary flows that are induced by axial curvature of the tubes. In this paper, we employ particle destination maps in conjunction with two-dimensional, finite-time Lyapunov exponent maps to illustrate how the trajectories of finite-mass particles are influenced by the presence of vortices. We consider two three-generation bronchial tube models: a planar, asymmetric geometry and a non-planar, asymmetric geometry. Our visualizations demonstrate that these techniques, coupled with judiciously seeded particle trajectories, are effective tools for studying particle/flow structure interactions.
Soni
Bela
B
Computational Simulation and Design Center, Mississippi State University, Mississippi, USA. bela@simcenter.msstate.edu
Thompson
David
D
Machiraju
Raghu
R
D001980:Bronchi / Q000502:physiology*; D003196:Computer Graphics; D003198:Computer Simulation; D006801:Humans; D008954:Models, Biological; D052638:Particulate Matter / Q000493:pharmacokinetics*; D012123:Pulmonary Ventilation / Q000502:physiology*; D012212:Rheology / Q000379:methods*; D014584:User-Computer Interface
D052638:Particulate Matter