![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
A nodal aerosol dynamics model TUTEAM (Tampere University of Technology Exhaust Aerosol Model) was developed to study the number and mass evolution of exhaust particles in a dilution system. The model includes processes such as nucleation, condensation, coagulation, and wall losses and it takes into account the dilution and temperature cooling profiles. The model considers nucleation and soot modes separately. For soot particles the fractal structure was implemented in the model to take the density and size, which continuously vary due to condensation, into account accurately. The model was compared with a set of dynamometer measurements of a heavy-duty diesel vehicle with different lubricant oils and fuels, and with a sectional aerosol dynamics model AEROFOR. The trends of nucleation mode geometric median diameter and number concentration as a function of fuel and lubricant sulphur contents were reproduced well. Also the predicted particle composition was in agreement with the measurements of CitationSchneider et al. (2005).
Acknowledgments
This work has been supported by Finnish Academy of Science and Letters, Vilho, Yrjö and KalleVäisälä Fund, by the Academy of Finland, and by Tekes, the Finnish Funding Agency for Technology and Innovation (project LIPIKA). We thank Dr. Kati Lehtovaara (née Vaaraslahti) of Ecocat Ltd (formerly of Tampere University of Technology) for measurement data and helpful advice. We gratefully acknowledge the helpful comments of the reviewers and the editor.