Molecular-resolution simulations of new particle formation: Evaluation of common assumptions made in describing nucleation in aerosol dynamics models

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: id:"swepub:oai:DiVA.org:su-142405" > Molecular-resolutio...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Olenius, TinjaStockholms universitet,Institutionen för miljövetenskap och analytisk kemi (author)

Molecular-resolution simulations of new particle formation : Evaluation of common assumptions made in describing nucleation in aerosol dynamics models

Article/chapterEnglish2017

Publisher, publication year, extent ...

2016-12-18
Informa UK Limited,2017
printrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:su-142405
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-142405URI
https://doi.org/10.1080/02786826.2016.1262530DOI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Aerosol dynamics models that describe the evolution of a particle distribution incorporate nucleation as a particle formation rate at a small size around a few nanometers in diameter. This rate is commonly obtained from molecular models that cover the distribution below the given formation size - although in reality the distribution of nanometer-sized particles cannot be unambiguously divided into separate sections of particle formation and growth. When incorporating nucleation, the distribution below the formation size is omitted, and the formation rate is assumed to be in a steady state. In addition, to reduce the modeled size range, the formation rate is often scaled to a larger size based on estimated growth and scavenging rates and the assumption that also the larger size is in a steady state. This work evaluates these assumptions by simulating sub-10 nm particle distributions in typical atmospheric conditions with an explicit molecular-resolution model. Particle formation is included either (1) dynamically, that is, the whole size range starting from single vapor molecules is modeled explicitly or (2) implicitly by using an input formation rate as is done in aerosol models. The results suggest that while each assumption can affect the outcome of new particle formation modeling, the most significant source of uncertainty affecting the formation rates and resulting nanoparticle concentrations is the steady-state assumption, which may lead to an overprediction of the concentrations by factors of approximately from two to even orders of magnitude. This can have implications for modeling and predicting atmospheric particle formation.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Maskinteknik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

Riipinen, IlonaStockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)iriip (author)
Stockholms universitetInstitutionen för miljövetenskap och analytisk kemi (creator_code:org_t)

Related titles

In:Aerosol Science and Technology: Informa UK Limited51:4, s. 397-4080278-68261521-7388

Internet link

Find in a library

Aerosol Science and Technology (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Olenius, Tinja; Riipinen, Ilona

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...

Articles in the publication: Aerosol Science ...

By the university: Stockholm University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se