Ammonia Removal By Air Curtain Ventilation CFD Simulation, ANSYS Fluent Training

Air curtain ventilation is a useful technique for controlling indoor air quality in laboratories, industrial buildings, and animal houses because it removes ammonia. This method uses an air curtain, a high-velocity air stream that promotes polluted air extraction and serves as a barrier to stop ammonia-laden air from spreading from one location to another. The presented study uses ANSYS Fluent to model ammonia removal by an air curtain ventilation system.

Simulation Process

The ammonia enters the zone from the bottom side. Three outlets are installed on the ceiling and equipped with an air curtain. The model is created and meshed in Design Modeler and ANSYS Meshing, respectively. It is perfectly clear that two species of air and ammonia are needed that require activation of Species Transport model. The high-velocity air acts as a carrier flow that hastens the removal process.

Post-processing

The ammonia gas rises to the highest parts of the domain in slow motion; however, the injection of air from the air curtain can boost the process and lead the gases through the outlets with high velocity. The exit velocity for the air-nh3 mixture is 4.28 m/s on average, which proves the proper ventilation and removal of toxic gases.