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![Conceptual illustration of cloud formation (source), " cloud-rise " and atmospheric dispersion of the cloud [5]. The REEDM model assumes that all chemical reactions are completed before the combustion process of the rise of the cloud. A mass fraction is assigned to each constituent and the total mass of the source (cloud) is multiplied by this fraction to determine the total mass of each chemical component in the cloud. The molecular weight of each species is used to convert the mass concentration per](profile/Gilberto-Fisch-2/publication/282606313/figure/fig1/AS:391757784207360@1470413742257/Conceptual-illustration-of-cloud-formation-source-cloud-rise-and-atmospheric.png)
Conceptual illustration of cloud formation (source), " cloud-rise " and atmospheric dispersion of the cloud [5]. The REEDM model assumes that all chemical reactions are completed before the combustion process of the rise of the cloud. A mass fraction is assigned to each constituent and the total mass of the source (cloud) is multiplied by this fraction to determine the total mass of each chemical component in the cloud. The molecular weight of each species is used to convert the mass concentration per
Source publication
This work shows the development of a model for the simulation of rocket exhaust effluent. The model is based on a semi-analytical solution of the time dependent three-dimensional advection-diffusion equation and overcomes the features of the Gaussian concepts considering realistic eddy diffusivities and wind profiles. We report numerical simulation...
Context in source publication
Context 1
... main assumption used in the REEDM model about the nature and behavior of the cloud released by the rocket is that it can be initially defined as a single cloud that grows and moves, but remains as a single cloud during the formation of the ascending phase of it. This concept is illustrated in Figure 1, and can be noticed that the model is designed for REEDM concentrations from the vertical position of the stabilized cloud. ...
Citations
This study presents the development of a new model named MSRED, which was designed to simulate the formation, rise, expansion, stabilisation and dispersion of rocket exhaust clouds for short-range assessment, using a three-dimensional semi-analytical solution of the advection-diffusion equation based on the ADMM method. For long-range modelling, the MSRED was built to generate a ready-to-use initial conditions file to be input to the CMAQ model, as it represents the state-of-the-art in regional and chemical transport air quality modelling. Simulations and analysis were carried out in order to evaluate the application of this integrated modelling system for different rocket launch cases and atmospheric conditions, for the Alcantara Launching Center (ALC, the Brazilian gate to the space) region. This hybrid, modern and multidisciplinary system is the basis of a modelling framework that will be employed at ALC for pre- and post-launching simulations of the environmental effects of rocket operations.
