2nd Iberian Meeting on Aerosol Science and Technology: Proceedings Book RICTA 2014

This Proceedings Book collects the conference articles and abstracts presented at RICTA 2014, the 2nd Iberian Meeting on Aerosol Science and Technology (also named Reunión Ibérica de Ciencia y Tecnología de los Aerosoles), held during July 7-9, 2014, in Tarragona, Spain. RICTA 2014 is the second Portuguese-Spanish meeting on Aerosol Science and Technology. Like the previous RICTA congress held in 2013 in Évora, Portugal, RICTA 2014 is the continuation of the successful RECTA, Reunión Española de Ciencia y Tecnología de Aerosoles, conferences, which have been held in Spain since 2007. RICTA 2014 has been organized by the Droplets, intErfaces, and floWs (DEW) Research Laboratory of the Universitat Rovira i Virgili, with the collaboration of the Asociación Española de Ciencia y Tecnología de los Aerosoles (AECyTA). The congress was held at the Campus Catalunya of the Universitat Rovira i Virgili. As in previous editions of RICTA and RECTA, the participation of young researchers has been encouraged, with the organization of the 5th Summer School on Aerosol Science and Technology, as well as awards for the best poster and PhD thesis. This book comprises three parts: the Conference Program, the Conference Articles, and the Conference Abstracts

A Comprehensive Framework for the Numerical Simulation of Evaporating Electrosprays

<div><p>A framework for simulating the coupled physical phenomena that occur in evaporating electrosprays has been developed. This framework comprises a 3D Lagrangian model for droplets dynamics, evaporation, and Coulomb explosions, as well as steady-state 2D Eulerian models for gas flow induced by the droplets motions, the transports of vapor and heat in the gas phase, and the transport of the charged residues left behind by the fully evaporated droplets (residual-charge). To couple these different physics, the Lagrangian code and the four Eulerian ones are solved sequentially in order to attain a fully coupled solution of the global steady-state. This methodology has been applied to three electrospray systems made from solvents of different volatility (acetone, methanol, and <i>n</i>-heptane), with identical droplet size distribution at injection (a lognormal with mean diameter of 8 μm and CV = 10%). All fields converged after just a few (five) sequences of simulation. In the two systems in which the droplets travel fastest (acetone and methanol), conical fringes develop in the contour maps of volumetric rate of generation of residual-charge, which correspond to the first few Coulomb explosions. In the system in which the droplets moved slowest (<i>n</i>-heptane), such contour maps show an unstructured region, instead.</p><p>Copyright 2015 American Association for Aerosol Research</p></div