Particle deposition in 90 bends - Comparison of different CFD models

Ke Sun, Hai Jiang, Lin Lu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper investigates the particle flow movement and deposition in a 90 bend after a straight duct by utilizing the Lagrangian particle-tracking model incorporated with a particle-wall collision model. Different turbulent and near-wall models of computational fluid dynamics (CFD) are compared to find their advantages and limitations for predicting particle movement. These models are validated for both airflow and particle flow by previous experimental data. Particle distribution and deposition behaviors at five size groups (1, 3, 5, 9, and 16 μm) are investigated. The results reveal that turbulent models varied in a considerable degree, i.e. about 2-3 times, when predicting the particle deposition velocities within the simulated scale t+=0.149-3.29. These findings will benefit the understanding of contaminant particle movement in ventilation systems.
Original languageEnglish
Title of host publication12th International Conference on Indoor Air Quality and Climate 2011
Pages728-733
Number of pages6
Volume1
Publication statusPublished - 1 Dec 2011
Event12th International Conference on Indoor Air Quality and Climate 2011 - Austin, TX, United States
Duration: 5 Jun 201110 Jun 2011

Conference

Conference12th International Conference on Indoor Air Quality and Climate 2011
CountryUnited States
CityAustin, TX
Period5/06/1110/06/11

Keywords

  • 90°bend
  • Deposition
  • IAQ
  • Particle distribution
  • Turbulent models

ASJC Scopus subject areas

  • Pollution

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