The dispersal of toxins in the atmosphere is of concern for various military and urban planning purposes. In addition to the nature of the toxin, factors such as the topology, wind direction, and ambient conditions also influence the nature of the dispersion. 

CFD is an ideal tool for modeling gaseous dispersion within building structures.  Natural gas leaks from common household items (e.g., stoves, dryers, etc.), and the resulting spread of the gas can be quickly modeled.

CFD is used to perform a complete fluid and thermal analysis of a nuclear waste storage unit. Numerical modeling of the system includes thermally-driven turbulent flow and heat transfer by convection, conduction and radiation. The CFD results show good agreement with the experimental temperature measurements available for the canister, heat shields and concrete walls. The ability to simultaneously predict flow patterns and temperature distributions makes Computational Fluid Dynamics a very efficient tool for assessing the overall cooling design of nuclear waste storage systems.