Inhaler Asthma Spray

Description: This project simulates the operation of an asthma inhaler spray using ANSYS Fluent, targeting the mechanics of drug delivery for patients experiencing shortness of breath. Since inhalers deliver medication directly into the airways rather than through systemic absorption, they offer an advantage in reduced side effects compared to oral or injectable treatments, and CFD provides a way to visualize exactly how the spray disperses upon release.

Methodology: The geometry, built in Design Modeler, includes the inhaler device with an internal orifice where the drug is injected, along with a surrounding computational zone representing the space into which the spray disperses; the domain is meshed in ANSYS Meshing with an unstructured grid of 752,277 cells. Because the goal is to track individual drug particles rather than treat the spray as a continuous phase, the simulation uses a Lagrangian approach through the Discrete Phase Model, with a surface-type injection releasing inert particles over an unsteady 0.1-second interval.

Analysis: Particle tracking is examined across several time steps, supported by an animation of the injection sequence, showing how the medication disperses from the device over time. The results confirm that the spray is delivered effectively into the surrounding domain and validate that the injection setup and solution were configured correctly.