About: How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Nucleation theories typically neglect the influence of the ambient pressure on the condensation of droplets from a supersaturated vapor, despite increasing experimental evidence. We have applied a recently presented model that incorporates this effect to the homogeneous nucleation rates of water at tropospheric conditions. We measured experimental pressure dependent nucleation rates of water in helium at low to intermediate pressures (70-200 kPa) and at temperatures from 240-270 K with the laminar flow diffusion chamber. The observed pressure effect shows a clear positive effect (increasing nucleation rate with increasing pressure) at 270 K and a weaker effect with lower temperatures, consistent with the theory. The experimental pressure effect was more pronounced than predicted by theory. The same principle of the pressure effect should also hold for heterogeneous nucleation of water, which implies that water vapor removal by droplet nucleation of water may be suppressed at tropospheric conditions. Nucleation theories typically neglect the influence of the ambient pressure on the condensation of droplets from a supersaturated vapor, despite increasing experimental evidence. We have applied a recently presented model that incorporates this effect to the homogeneous nucleation rates of water at tropospheric conditions. We measured experimental pressure dependent nucleation rates of water in helium at low to intermediate pressures (70-200 kPa) and at temperatures from 240-270 K with the laminar flow diffusion chamber. The observed pressure effect shows a clear positive effect (increasing nucleation rate with increasing pressure) at 270 K and a weaker effect with lower temperatures, consistent with the theory. The experimental pressure effect was more pronounced than predicted by theory. The same principle of the pressure effect should also hold for heterogeneous nucleation of water, which implies that water vapor removal by droplet nucleation of water may be suppressed at tropospheric conditions. (en)
Title	How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions (en)
skos:prefLabel	How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions (en)
skos:notation	RIV/67985858:_____/10:00349147!RIV11-AV0-67985858
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika	-
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Brus, David
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	262157
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/10:00349147
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nucleations theories; ambient pressure; condensation of droplets (en)
http://linked.open.../riv/klicoveSlovo	ambient pressure condensation of droplets nucleations theories
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[6E9111B4B37D]
http://linked.open...i/riv/nazevZdroje	Geophysical Research Letters
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	37
http://linked.open...iv/tvurceVysledku	Brus, David Hyvärinen, A.-P. Lihavainen, H. Wedekind, J.
http://linked.open...ain/vavai/riv/wos	000283941700010
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
issn	0094-8276
number of pages	4 (xsd:int)
is http://linked.open...avai/riv/vysledek of	How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions How Ambient Pressure Influences Water Droplet Nucleation at Tropospheric Conditions

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