Switching and transport mechanism in the branching tube network due to attached eddies

15th Asian Congress of Fluid Mechanics

物理学;力学

Nozaki, Yurika^1 ; Ohhashi, Kenta^1 ; Sano, Osamu^1

Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo, Koganei

184-8588, Japan^1

关键词: Oscillatory flows;    Particle image velocimetries;    Small spheres;    Suspended particles;    Throttle valve;    Transport mechanism;    Velocity field;    Womersley numbers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/822/1/012077/pdf
DOI  :  10.1088/1742-6596/822/1/012077

学科分类：力学，机械学

来源: IOP

【 摘 要 】

An experimental study was performed on the quasi-two-dimensional symmetric branching tube under oscillatory flow. The velocity field and transport of materials in the Reynolds number Re = 1500 ∼ 3000 and the Womersley number α = 17 ∼ 23 were visualized by means of a dye or small spheres as well as measured by using Particle Image Velocimetry. The repeated growth and disappearance of the attached eddies near the junction of the branched channel are recognized, which play a role of the throttle valves to control the transport of newly taken gasses or suspended particles into, and older ones out of, the human lung in spite of zero net volume flux.