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TECHNICAL PAPERS: Fluids/Heat/Transport

Numerical Simulation of the Flow and Concentration Fields for Oxygen Delivery Systems

[+] Author and Article Information
H. Hangan, S. Bekele

The Boundary Layer Wind Tunnel Laboratory, The University of Western Ontario, London, Ontario, Canada

J Biomech Eng 125(5), 648-662 (Oct 09, 2003) (15 pages) doi:10.1115/1.1613296 History: Received February 19, 2002; Revised May 06, 2003; Online October 09, 2003
Copyright © 2003 by ASME
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References

Figures

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Oxygen delivery systems: (a) Venturi mask with face surface, Geometry and Grid; (b) Detail of the OxyArm A1: Geometry and Grid, Oxygen flow upwards; (c) Detail of OxyArm A2 Geometry and Grid, Oxygen flow upwards. Note: The distance between the Oxygen inlet of OxyArm A1 and A2 portable devices and the mouth was 3.4 cm for all solutions. Hangan, ASME Journal of Biomechanical Engineering.
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Breathing cycle. Velocity variation with time. Hangan, ASME Journal of Biomechanical Engineering.
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Solution boundary position independency check. O2 Concentration profile between mushroom head and the mouth. Hangan, ASME Journal of Biomechanical Engineering.
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Solution mesh-size independency check. O2 Concentration profile between mushroom head and the mouth. Hangan, ASME Journal of Biomechanical Engineering.
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Venturi mask longitudinal section (a) O2 concentrations (b) Velocity vectors. Hangan, ASME Journal of Biomechanical Engineering.
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(a) OxyArm A1, longitudinal section, Velocity vectors for 1.1 m/s (upper) and 2.2 m/s (lower). (b) OxyArm A1, longitudinal section, Oxygen concentrations for 1.1 m/s (upper) and 2.2 m/s (lower). Hangan, ASME Journal of Biomechanical Engineering.
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(a) OxyArm A2, longitudinal section, Velocity vectors for 1.5 m/s (upper) and 3 m/s (lower) (b) OxyArm A2, longitudinal section, Oxygen concentrations for 1.5 m/s (upper) and 3 m/s (lower). Hangan, ASME Journal of Biomechanical Engineering.
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Clinical trial (lines & symbols) and CFD (bold symbols) results for various Oxygen delivery devices. Oxygen concentrations versus flow rates. Hangan, ASME Journal of Biomechanical Engineering.
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Velocity vectors for various configurations, no inhalation (a) OxyArm A1, 1.1 m/s (b) OxyArm A1, 2.2 m/s (c) OxyArm A2, 1.5 m/s. Hangan, ASME Journal of Biomechanical Engineering.
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Venturi Mask: Mouth Level O2 Concentrations (upper) and Respiratory Cycle (lower). Hangan, ASME Journal of Biomechanical Engineering.
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Venturi Mask: Position 1: inhalation 1; Position 2: inhalation 2; Position 3: exhalation; Position 4: pause. Hangan, ASME Journal of Biomechanical Engineering.
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OxyArmA1: Mouth Level O2 Concentrations (upper) and Respiratory Cycle (lower). Hangan, ASME Journal of Biomechanical Engineering.
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OxyArm A1: Position 1: inhalation 1; Position 2: inhalation 2; Position 3: exhalation; Position 4: pause. Hangan, ASME Journal of Biomechanical Engineering.

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