Smoking Room, ANSYS Fluent CFD Simulation Tutorial

Description

Description 

The present problem simulates the cigarette smoke inside a smoking room, existing an exhaust fan on the upper wall of the room by ANSYS Fluent software. In the present case, we assume that cigarette smoke makes of four materials, we which simulate using different models.  

Furthermore, six air intakes at the bottom of the walls, suck air into the domain due to the room’s negative pressure. Air circulation and ventilation take place by exhaust and intake fans.  

This simulation shows how smoke in such a room effect by air vortices in certain areas and gives us an understanding of the best places to place a couch or sofa.

For a closer look, a smoking woman is sitting on a bench near the center of the domain, which is approximately closer to the direction of the exhaust fan; another woman is standing in front of her while there is a cigarette in his hand and a man who is just talking to them without smoking. 

The geometry of the present model is three-dimensional and it designs using Design Modeler software. We do the meshing of the present model by Fluent Meshing software. The mesh type is Polyhedra, and the element number is 965,187. 

Methodology: Smoking Room

We use both Species transport and Discrete Phase Model (DPM) models to simulate cigarette smoke, and also we give a negative pressure of -10 (pa) to the exhaust fan, which it puts on the ceiling.  

Also, the Energy equation is On to capture the temperature, and the Viscous is set as the Standard k-epsilon model. 

Conclusion 

Since the main purpose of the issue is to investigate the movement of smoke in the room, its pathlines, contours, and vectors. We obtain two-dimensional and three-dimensional contours related to temperature, pressure, and velocity, as well as the mass fraction of smoke materials. We draw the two-dimensional contours in two sections, YZ, and XZ, passing through the center of the Smoking room.

The smoke pathlines during time obviously show the distribution affected by the air exhaust and intake fan airflow.
The results show that sofas or benches in the smoke room place closer to the direction of the exhaust fan due to the minimum possibility of air vortex.

In this simulation, the smoke enters the domain only from the cigarette butts, while inhalation of smoke could be a significant parameter in these locations and we can it.