Numerical modeling of convective flows above large fires at various atmospheric conditions

Using a proposed mathematical compressible medium model, the dynamics of the formation and rise of an axisymmetrical column of combustion products above large-scale fires in a moisture-containing stratified atmosphere are investigated numerically. An algebraic turbulence model is employed to determine the effective transport coefficients. A comparative calculation is performed of the smoke aerosol distribution along the convective column height at various values of fire strength and atmospheric characteristics. It is shown that the phase transitions caused by the presence of moisture in the atmosphere have a substantial effect on the parameters of the rise, the hovering and of aerosol removal into the stratosphere.