Drag coefficient of a spherical particle attached on the flat surface

Chun Nan Liu, Chih Liang Chien, Chu Chun Lo, Guan Yu Lin, Sheng Chieh Chen, Chuen-Tinn Tsai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The previous analytical solution for the drag coefficient (C d) for a spherical particle attached on the flat surface, which was derived by O'Neill (1968), is only valid in the creeping flow conditions. It is important to extend O'Neill's formula to cover a wide range of particle Reynolds number (Re p). In this study, the drag coefficient was calculated numerically to cover Rep from 0.1 to 250. For a particle suspended in the air, an empirical drag coefficient exists, which is defined as C d = f × 24/Re p, where f is a correction factor depending on Re p. The applicability of the correction factor f for O'Neill's analytical equation for the spherical particle attached on the flat surface for Re p = 0.1 to 250 was examined in this study.

Original languageEnglish
Pages (from-to)482-486
Number of pages5
JournalAerosol and Air Quality Research
Volume11
Issue number5
DOIs
StatePublished - 1 Oct 2011

Keywords

  • Boundary layer
  • Drag coefficient
  • Numerical simulation
  • Reynolds number

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