Species Transport: Air Freshener Spray Device

Air Freshener Spray Device CFD Simulation

Description

This project presents the numerical simulation of an air freshener device using ANSYS Fluent software.

An air freshener is used to spray aromatic substances and is commonly found in rooms, homes, and public places. The mechanism of these devices is based on spraying: an aromatic liquid is stored inside the chamber of the air freshener and is then dispersed into the surrounding space through spraying.

The geometry of the project is modeled using Design Modeler software. The geometry represents an air freshener, and the computational zone includes a sample box surrounding the device to study the spraying process within this space. The model is then meshed using ANSYS Meshing software. The mesh is unstructured, and the number of cells is equal to 357,758.

Methodology

In this project, the spraying of fragrant particles is simulated, which requires the use of the Lagrangian approach. According to this approach, the particles are tracked individually within a discrete space. For this purpose, the Discrete Phase Model (DPM) is used, and an injection is defined to disperse the discrete particles.

The injection type is conical, and the particle type is droplet. The particle injection is unsteady and occurs over a period of 0.4 seconds. To make use of droplet injection, the Species Transport model is also defined, with three volumetric species: oxygen, nitrogen, and water vapor.

Conclusion

After the solution, particle tracking is studied at different points in time, and an animation of the particle injection is also obtained. By examining the particles over time, the spraying process of the device can be analyzed. The results show that the simulation is performed correctly and that the device sprays the fragrant particles effectively.