Application99 Diffusion Analysis of Material

Femtet ver.2022 has had a new function of diffusion analysis which handles passive scalar.
This example analyzes a distribution of nitrogen concentration in the experimental room where nitrogen of 100% concentration has been generated.

Analysis Model:
The container on the desk at the center of the experimental room is set to generate gas. Inflow/outflow conditions are set in the room where local ventilation by draft chambers, air conditioning, and air venting are simulated.

The result shows nitrogen concentration is low in the vicinity of air conditioners, air vents, and local ventilators.
The result also shows nitrogen concentration is high at the back of a desk where air stagnates or flows in the direction opposite to the airflow of the air conditioner.