Introduction

Air quality control has been paid much attention in the last thirty years to reducing the outdoor pollution, but only recently has the international scientific community worried about reducing the contamination of the air of closed environments. There are many sources of indoor air pollution. Tobacco smoke, cooking and heating appliances, and vapors from building materials, paints, furniture, etc. cause pollution inside buildings. Outdoor pollutant control is another major problem. Each year, hundreds of millions of tons of gases and particulates pour into the atmosphere. Most of this pollution results from the burning of fuel to power motor vehicles and heat buildings. In this regard, a CFD model of a house with multiple rooms is generated and concentration of gaseous and particulate pollutants are evaluated. The animation file shows CO₂ concentration.

FLUENT™ CFD package is used to solve the flow field in house. Two rooms are assumed and different air conditioning vents are tested. The flow field is evaluated for the three dimensional model in turbulent flow. CO₂ as pollutant enters the house from different locations. Species transport and Large Eddy simulation turbulence models are used. The inlet velocity for emission sources is held at 0.5 m/s. The animation file shows path lines inside the house colored by CO₂ concentration.

Carbon particles of sizes 10 nanometers to 10 microns are injected from different locations. Particle resuspension is studied. Optimized locations of the inlets and outlets (air conditioning system) are studied. In the animations, the red and blue squares on the roof represent outlets and inlets respectively.

Copyright © Kambiz Nazridoust, 2005.