Application of the characteristics-based sectional method to spatially varying aerosol formation and transport

E.M.A. Frederix, A.K. Kuczaj, M. Nordlund, A.E.P. Veldman, B J. Geurts

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

The characteristics-based ssolution. It is easy to verify thatectional method (CBSM) offers an Eulerian description of an internally mixed aerosol. It was shown to be robust and capable of exact preservation of lower order moments, allowing for highly skewed sectional droplet size distributions. In this paper we apply CBSM to a spatially varying flow, by incorporating the fractional step method. In this way an accurate time integration of the spatial terms in the transport equations for the velocity, mass fractions and sectional droplet concentrations is achieved. Integrating CBSM into the compressible PISO (Pressure-Implicit with Splitting of Operators) algorithm allows for phase change and corresponding changes in pressure. We apply CBSM to a lid-driven cavity flow. First, the steady state isothermal flow solution is validated against published data. Next, by releasing a saturated vapor into the cavity while cooling the walls, we simulate the formation of aerosol. The accuracy of the solution is studied, as well as the performance of the CBSM scheme in the spatially varying context. The solution of the velocity is shown to be accurate, even at CFL (Courant–Friedrichs–Lewy) numbers of unity. The feasibility of the developed method is demonstrated in a 3D complex geometry studying the aerosol generation via nucleation of hot vapors cooled by a dilution stream of cold air in a double-mixing tee system. The sectional approach delivers detailed information about the aerosol formation and size distribution of the droplets in the domain.

Original languageEnglish
Pages (from-to)123-140
Number of pages18
JournalJournal of Aerosol Science
Volume104
DOIs
Publication statusPublished - 1 Feb 2017

Fingerprint

aerosol formation
Aerosols
droplet
aerosol
cavity
cold air
Vapors
nucleation
dilution
particle size
Dilution
cooling
Mathematical operators
geometry
Nucleation
Cooling
Geometry
method
Air

Keywords

  • Aerosol
  • Characteristics
  • Coagulation
  • Condensation
  • Droplet size distribution
  • Eulerian
  • Multi-phase
  • Nucleation
  • PISO
  • Sectional

Cite this

Frederix, E.M.A. ; Kuczaj, A.K. ; Nordlund, M. ; Veldman, A.E.P. ; Geurts, B J. / Application of the characteristics-based sectional method to spatially varying aerosol formation and transport. In: Journal of Aerosol Science. 2017 ; Vol. 104. pp. 123-140.
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Application of the characteristics-based sectional method to spatially varying aerosol formation and transport. / Frederix, E.M.A.; Kuczaj, A.K.; Nordlund, M.; Veldman, A.E.P.; Geurts, B J.

In: Journal of Aerosol Science, Vol. 104, 01.02.2017, p. 123-140.

Research output: Contribution to journalArticleAcademicpeer-review

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