Description

This project simulates the delivery of an asthma spray into human lungs using ANSYS Fluent. The 3D geometry—built in SpaceClaim—represents a simplified lung model with a 50 cm inlet diameter. The mesh (ANSYS Meshing) contains 3,734,238 elements. Given the time-dependent nature of inhalation and particle motion, a transient solver is used.

Asthma Spray Methodology

A one-way coupled Discrete Phase Model (DPM) tracks aerosol particles moving through a continuous air phase. Air enters at 5 m/s, with gravity set to −9.81 m/s² along the z-axis. Particles (diameter 100 µm) are introduced via a surface-velocity injection at the inlet. Turbulence is resolved with the realizable k–ε model. Particle trajectories inside the lung domain are computed and visualized to assess transport and deposition behavior.

Conclusion

Post-processing provides 2D and 3D contours of velocity and pressure, along with an animation of particle tracks throughout the lungs, illustrating the spray’s distribution following inhalation.