Research required for predicting the behavior of pressurized gases escaping into the atmosphere

The prediction of the behavior of pressurized gases accidentally released into the atmosphere requires many considerations, among which are thermodynamics, momentum, buoyancy (positive and negative), entrainment, and ambient wind and temperature structure. The problem can be divided into four parts: thermodynamics of expanding gases; diffusion of jets (momentum effects dominate); diffusion of light gases (positive buoyancy); and diffusion of dense gases