Supplementary material to "Simulation-aided characterization of a versatile water condensation particle counter for atmospheric airborne research"
Year: 2021
Type: supplementary-materials
Abstract: Numerical simulation of three-stage water-based CPC operation Assumption1. Water vapor through a cylindrical growth tube is described by the energy equation of aNewtonian fluid under steady laminar flow conditions.2. The particle flow is assumed to be an incompressible Newtonian fluid with a fully developed parabolic flow profile: ๐ฃ๐ฃ ๐ง๐ง (๐๐) = ๐ฃ๐ฃ 0 ๏ฟฝ1 -๐๐ 2 ๐
๐
2 ๏ฟฝ = ๐ฃ๐ฃ 0 (1 -๐ฅ๐ฅ 2 ), where ๐ฃ๐ฃ 0 , r, and R represent initial velocity (m/s), radial position (mm), and growth tube radius, respectively, and x is the dimensionless length.3. Axial thermal diffusion and other second-order effects such as Stefan flow are ignored. Simplified 1-D heat and mass transferThe 1-D heat transfer: a partial differential equation of steady laminar flow:๐ท๐ท ๐ก๐กโ is the thermal diffusivity of the air, 0.215 cm 2 /sec at STP.At the other operation conditionThe 1-D mass transfer: a partial differential equation for partial vapor pressure:) ๐ท๐ท ๐ฃ๐ฃ๐ฃ๐ฃ is the mass diffusivity of the water vapor, 0.251 cm 2 /sec (0.21 by Steve) at STP.At the other operation condition, ๐ท๐ท ๐ฃ๐ฃ๐ฃ๐ฃ,๐๐ = ๐ท๐ท ๐ฃ๐ฃ๐ฃ๐ฃ (๐๐/1(๐๐๐๐๐๐)) โ * ( ๐๐ 273
Authors: Fan Mei, Steven Spielman, Susanne Hering, Jian Wang, Mikhail Pekour, Gregory Lewis, Beat Schmid, Jason Tomlinson, Maynard Havlicek
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W4231499435