Conference Agenda
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SS2+SS3: Fundamental studies of aerosol and contrail formation
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11:30am - 11:45am
WE2-3: 1 Mechanism of particulate matter formation from wood burning stoves related to fuel properties and user operation. University of Manchester, United Kingdom An Ecodesign compliant stove was use to investigate the mechanisms of PM formation, using a variety of both softwood and hardwoods with 3 fuel moisture levels- dry (10%), seasoned (15%-20%) and wet (>25%). Additionally, the impacts of user behaviour such as overloading or underloading the stove was assessed. Finally, the effect of flue draft was investigated, simulating impacts of changing atmospheric conditions. The results are discussed in terms of relationship between fuels and operation, and the formation mechanisms of PM in relation to the combustion chemistry and the Global Warming Potential (GWP) the of soot particles.
11:45am - 12:00pm
WE2-3: 2 Chemical nucleation of carbonaceous nanoparticles by n-heptane pyrolysis via molecular dynamics simulations 1The University of Melbourne, Australia; 2Stanford University, USA; 3Delft University of Technology, The Netherlands Chemical nucleation of carbonaceous nanoparticles is explored by reactive Molecular Dynamics. The critical nucleus size is determined by free formation energy calculations and a nucleation rate is proposed, for the first time to the best of our knowledge, without a priori assumptions of the chemical reaction network and associated rate constants, or of the nucleation mechanism.
12:00pm - 12:15pm
WE2-3: 3 A monodisperse population balance equation model for hetero-aggregate formation in aerosol streams 1University of Duisburg-Essen, Germany; 2CENIDE, Center for Nanointegration Duisburg‑Essen Hetero-aggregates are composites of different particles, often formed by mixing aerosol streams. Simulating their formation is complex due to factors like volume, fractal structure, and composition, making traditional sectional models computationally expensive. This study presents a new, efficient population balance equation (PBE) model based on the monodisperse framework by Jeong and Choi (2003), integrated with computational fluid dynamics (CFD) using the Eulerian-Lagrangian decomposition (ELD) method. Validated against a sectional model developed by Shigeta and Watanabe (2003, 2004), it maintains accuracy while being over 2500 times faster. This efficiency makes it ideal for CFD applications, including the PsiPhi in-house CFD code.
12:15pm - 12:30pm
WE2-3: 4 Laboratory study of contrail formation potential from hydrogen combustion emissions 1Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki, Finland; 2Multi-Physics for Energetics Department, ONERA Université Paris Saclay, F-91123, Palaiseau, France; 3Airbus Operations SAS, Toulouse, France; 4Safran Aircraft Engines, Rond-point René Ravaud, F-77550, Moissy-Cramayel, France We will presnet a laboratory study of contrail potential formation from hydrogen combustion, In this study, water, air, oil vapors and nitrogen oxides are injected into a system to simulate the potential emissions generated by a hydrogen engine. Different NOx concentrations have been studied, combined or not with lubrication oil vapors and background aerosol.
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