The flow and concentration fields for various medical oxygen delivery devices are numerically investigated. Simulations are performed for a classical Venturi mask and two new OxyArm portable devices. The velocity and oxygen concentration fields are investigated for: (i) a constant (steady-state) inhalation and (ii) a complete respiratory cycle (unsteady). The numerical results are qualitatively compared with clinical trials. It is found that the optimal functioning of these medical devices implies a balance between oxygen delivery by advection and the mixing process that allows for reliable monitoring (capnographic capability). Also, at the typical scales associated with these devices the flow is found to be Reynolds number dependent.
Numerical Simulation of the Flow and Concentration Fields for Oxygen Delivery Systems
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received by the Bioengineering Division February 19b, 2002; revision received May 6, 2003. Associate Editor: C. R. Ethier.
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Hangan, H., and Bekele, S. (October 9, 2003). "Numerical Simulation of the Flow and Concentration Fields for Oxygen Delivery Systems ." ASME. J Biomech Eng. October 2003; 125(5): 648–662. https://doi.org/10.1115/1.1613296
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