%0 Journal Article %T A multilayer model to simulate rocket exhaust clouds %A Davidson Martins Moreira %A Leonardo Barboza Trindade %A Gilberto Fisch %A Marcelo Romero de Moraes %J Journal of Aerospace Technology and Management %D 2011 %I Institute of Aeronautics and Space %X This paper presents the MSDEF (Modelo Simulador da Dispers o de Efluentes de Foguetes, in Portuguese) model, which represents the solution for time-dependent advection-diffusion equation applying the Laplace transform considering the Atmospheric Boundary Layer as a multilayer system. This solution allows a time evolution description of the concentration field emitted from a source during a release lasting time tr , and it takes into account deposition velocity, first-order chemical reaction, gravitational settling, precipitation scavenging, and plume rise effect. This solution is suitable for describing critical events relative to accidental release of toxic, flammable, or explosive substances. A qualitative evaluation of the model to simulate rocket exhaust clouds is showed. %K Alcantara Launch Center %K Advection-diffusion equation %K Atmospheric dispersion %U http://www.jatm.com.br/papers/vol3_n1/JATMv3n1_p41-52_A_multilayer_model_to_simulate_rocket_exhaust_clouds.pdf