Enhanced gas transport during high-frequency ventilation

Abstract eng:
This study focuses on the potential for nonlinear mean streaming to enhance the gas transport during high-frequency ventilation, a ventilation strategy used in intensive care wards. Direct numerical simulations of the reciprocating flow in a pipe are conducted, as this basic flow serves as a model of the flow in various sections of the human airway. In particular, the impact of modifying the end conditions of the pipe, so that there is some asymmetry from one end to the other, is investigated. Preliminary results show that the streaming flow, which progresses in one direction in the middle of the pipe, and the opposite direction at the sides, is reasonably insensitive to the frequency of oscillation, but it is heavily dependent on the amplitude.

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