Study of Impact of Ventilation on CO2 Diffusion in a Building Corridor Due to Room Combustion Using Ansys Software
Indoor air quality is a critical aspect of occupant health and well-being. Carbon dioxide CO2 levels are commonly used as an indicator of ventilation adequacy and are influenced by factors such as occupancy, ventilation rates, and the efficiency of air exchange within a space. This report focuses on utilizing Ansys simulation to study the diffusion CO2 resulting from a fire within a building floor with pre-installed ventilation configuration.
This study aims to computationally investigate the diffusion characteristics of carbon dioxide resulting from a desk fire inside a building floor in two cases (with ventilation, no ventilation) showing velocities and concentrations through the floor.
Geometry & Mesh
Results before turning fans on.
Results After turning fans on.
The diffusion of carbon dioxide (CO2) in air is a natural process governed by the principles of gas diffusion. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. In the context of CO2 in air, this means that CO2 molecules will move from regions where there is a higher concentration of CO2 to regions where there is a lower concentration.
The diffusion speed is affected by:-
Concentration Gradient: The greater the difference in concentration between two areas, the faster the diffusion
Temperature: Generally, higher temperatures increase the kinetic energy of molecules, leading to faster diffusion.
Molecular Weight: Lighter molecules tend to diffuse faster than heavier ones
