Fluid Dynamics in Airway Bifurcations: III. Localized Flow Conditions
Source: Inhalation Toxicology, Volume 13, Number 4, 1 April 2001 , pp. 291-305(15)
Publisher: Informa Healthcare
Abstract:Localized flow conditions (e.g., backflows) in transition regions between parent and daughter airways of bifurcations were investigated using a computational fluid dynamics software code (FIDAP) with a Cray T90 supercomputer. The configurations of the bifurcations were based on Schreck's (1972) laboratory models. The flow intensities and spatial regions of reversed motion were simulated for different conditions. The effects of inlet velocity profiles, Reynolds numbers, and dimensions and orientations of airways were addressed. The computational results showed that backflow was increased for parabolic inlet conditions, larger Reynolds numbers, and larger daughter-to-parent diameter ratios. This article is the third in a systematic series addressed in this issue; the first addressed primary velocity patterns and the second discussed secondary currents.
Document Type: Research Article
Publication date: 2001-04-01