11:30am - 11:45amWE2-3: 1
Mechanism of particulate matter formation from wood burning stoves related to fuel properties and user operation.
Amanda Lea-Langton, Daniel Wilson, Oday Hakami, Gordon McFiggans, Paul Williams
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 - 12:00pmWE2-3: 2
Chemical nucleation of carbonaceous nanoparticles by n-heptane pyrolysis via molecular dynamics simulations
Arash Fakharnezhad1, Dimitri Saad2, Georgios Kelesidis3, Eirini Goudeli1
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 - 12:15pmWE2-3: 3
A monodisperse population balance equation model for hetero-aggregate formation in aerosol streams
Amir Karimi Noughabi1, Andreas Kempf1,2, Irenäus Wlokas1,2
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 - 12:30pmWE2-3: 4
Laboratory study of contrail formation potential from hydrogen combustion emissions
Jonathan Duplissy1, Juho Tapio Elomaa1, Cecilia Righi1, Nina Sarnela1, Tommy Chan1, Frans Graeffe1, Tuukka Petaja1, Alaric Vandestoc2, Louise Ganeau2, Antoine Berthier2, Charles Renard3, Abhijeet Sanjay Badhe3, Lucile Arsicaud3, Jean Baptiste May-Carle4, Ismael Kenneth Ortega Colomer2
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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