Transport and dispersion of air flow of heavy gas emitted by a point source

A system of differential equations of Euler (continuity, motion, energy, and state) in the partial differential equation with appropriate boundary conditions is used to simulate the transport and dispersion of exhaust gases of motor transport. The numerical solution of the problem based on the method of large particles (Davydov method). Accounting for the buoyancy of exhaust gases is within the Boussinesq approximation.