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Comparison of the Transport Models of a Laminar Flow Diffusion Chamber
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SYSNO ASEP 0394769 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Comparison of the Transport Models of a Laminar Flow Diffusion Chamber Author(s) Trávníčková, Tereza (UCHP-M) RID, ORCID, SAI
Havlica, Jaromír (UCHP-M) RID, ORCID, SAI
Ždímal, Vladimír (UCHP-M) RID, ORCID, SAISource Title AIP Conference Proceedings, Volume 1527. - Melville, New York : AIP Publishing, 2013 / DeMott P.J. ; O'Dowd C.D. - ISSN 0094-243X - ISBN 978-0-7354-1152-4 Pages s. 79-82 Number of pages 4 s. Publication form Print - P Action International Conference on Nucleation and Atmospheric Aerosols /19./ Event date 23.06.2013-28.06.2013 VEvent location Fort Collins, Colorado Country US - United States Event type WRD Language eng - English Country US - United States Keywords nucleation ; mathematical modeling ; LFDC Subject RIV BJ - Thermodynamics R&D Projects IAA200760905 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support UCHP-M - RVO:67985858 UT WOS 000319766400018 DOI https://doi.org/10.1063/1.4803208 Annotation The aim of this work is to show how the complexity of the modeling of the transport processes affects the results of the nucleation experiments in the Laminar Flow Diffusion Chamber (LFDC). For this purpose, data measured by Hyvärinen et al. [1] were recalculated using models at different levels of complexity. We focused on the influence of hydrodynamics (Navier-Stokes equations or parabolic profile assumption) and coupled terms (Dufour effect and thermodiffusion) on the results. We found that the choice of hydrodynamic model affects both the position of nucleation maxima in the LFDC and the maximum of the nucleation rate. On the other hand, the presence of coupled terms in the model significantly affects only the peak value of the nucleation rate. In order to compare the results obtained by different models, we present a method quantifying relative uncertainty in the determination of the nucleation rate. The prediction of each model was compared to the full model with the Navier-Stokes equations and both coupled terms. The comparison shows that an inappropriate choice of model could lead to serious deviations that may reach several hundred percent in a given case. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2014 Electronic address http://proceedings.aip.org/resource/2/apcpcs/1527/1?isAuthorized=no
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