Computational Modeling of a Low-Cost Fluidic Oscillator for Use in an Educational Respiratory Simulator

Area of Science:

• Engineering
• Medical Simulation
• Fluid Dynamics

Background:

• Respiratory simulators are crucial for medical education.
• Existing simulators can be expensive and complex.
• There is a need for accessible, low-cost educational tools.

Purpose of the Study:

• To computationally model and develop an inexpensive, easily manufactured fluidic oscillator for educational respiratory simulators.
• To provide realistic visualization and tuning of respiratory biomechanics.
• To serve as a pedagogical tool for STEM students.

Main Methods:

• Computational fluid dynamics (CFD) modeling was used to assess system flow characteristics.
• A prototype fluidic oscillator was designed and manufactured.
• The prototype was tested with a commercial respiratory simulator.

Main Results:

• Simulations demonstrated clinically relevant periodic oscillations.
• Outlet pressures ranged from 8-20 cmH2O.
• Tunable frequencies allowed for respiratory rates of 10-20 breaths per minute (3-6s).

Conclusions:

• The fluidic oscillator operates at physiologically relevant pressures and frequencies.
• It offers a low-cost, hands-on, and reliable alternative for respiratory simulation education.
• The device facilitates learning about respiratory biomechanics and manufacturing techniques.