MicroSpray is a microscale Lagrangian particle model derived from SPRAY code and able to take into account the presence of obstacles. Microspray is especially oriented to deal with gas dispersion in urban environment and industrial sites. It is a flexible tool including the treatment of several features: plume without initial momentum and with initially arbitrarily oriented momentum, negative or positive buoyancy, elevated and ground level emissions, instantaneous and continuous emissions, time varying sources, cloud spread at the ground due to gravity, bouncing against obstacles and particle reflection at the domain bottom in presence of a dense cloud. Modules treating the phase changes liquid – vapour that may occur at the source, and the latent heat processes in the dispersing cloud, such as aerosol evaporation, have been recently implemented. MicroSPRAY is applied in the frames of MSS (MicroSwift-Spray) and MicroRMS (RAMS-MIRS-SPRAY) modelling systems.

Simulation of the dispersion of airborne pollutants trough the stochastic motion of virtual particles in the turbulent atmospheric flow in complex topography and presence of obstacles at the microscale (100 m, up to 1 km), for buoyant or non-buoyant release

Silvia Trini Castelli
bibliographic references: 

Tinarelli G., Mortarini L., Trini Castelli S., Carlino G., Moussafir J., Olry C., Armand P. and Anfossi D., 2012. Review and Validation of MicroSpray, a Lagrangian Particle Model of Turbulent. In: Dispersion Lagrangian Modeling of the Atmosphere, AGU Geophysical Monograph, Lin J.C., D. Brunner, C. Gerbig, A. Stohl, A. Luhar, and P. Webley Eds., vol. 200, 311-327. ISBN: 978-0-87590-490-0;

Anfossi D., Tinarelli G., Trini Castelli S., Nibart M., Olry C., Commanay J., 2010. A new Lagrangian particle model for the simulation of dense gas dispersion. Atmospheric Environment, 44 (6), 753-762

Tinarelli G., Anfossi D., Trini Castelli S., Albergel A., Ganci F., Belfiore G., Moussafir J., 2008. Development of a Lagrangian Particle Model for Dense Gas Dispersion in Urban Environment. Air Pollution Modeling and its Application XIX, Springer Publishers, 28-36. ISBN: 978-1-4020-8451-5

Tinarelli G., Brusasca G., Oldrini O., Moussafir J., Anfossi D., Trini Castelli S., 2007. Micro Swift-Spray (MSS), a new modelling system for the simulation of dispersion at microscale. Air Pollution Modelling and its Applications XVII, Borrego C. and Norman A.L. Eds., Springer Publishers, 449-458. ISBN: 978-0-387-28255-8