Effect of geometric variations on pressure loss for a model bifurcation of the human lung airway

Abstract Characteristics of pressure loss (Δ P ) in human lung airways were numerically investigated using a realistic model bifurcation. Flow equations were numerically solved for the steady inspiratory condition with the tube length, the branching angle and flow velocity being varied over a wide r...

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Veröffentlicht in:	Journal of biomechanics 2011-04, Vol.44 (6), p.1196-1199
Hauptverfasser:	Kang, Min-Yeong, Hwang, Jeongeun, Lee, Jin-Won
Format:	Artikel
Sprache:	eng
Schlagworte:	Air breathing Airways Bifurcation model Bifurcations Biological and medical sciences Biomechanics. Biorheology Branching angle Computational fluid dynamics Computational fluid dynamics (CFD) Developing flow Fluid flow Fundamental and applied biological sciences. Psychology Human Humans Length to diameter Lung - anatomy & histology Lung - physiology Lungs Mathematical models Models, Biological Physical Medicine and Rehabilitation Pressure Pressure loss Respiratory Mechanics - physiology Respiratory Rate - physiology Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics Tissues, organs and organisms biophysics Tubes Vertebrates: respiratory system
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Zusammenfassung:	Abstract Characteristics of pressure loss (Δ P ) in human lung airways were numerically investigated using a realistic model bifurcation. Flow equations were numerically solved for the steady inspiratory condition with the tube length, the branching angle and flow velocity being varied over a wide range. In general, the Δ P coefficient K showed a power-law dependence on Reynolds number (Re) and length-to-diameter ratio with a different exponent for Re≥100 than for Re
ISSN:	0021-9290 1873-2380
DOI:	10.1016/j.jbiomech.2011.02.011