Thermophoretic deposition efficiency in a cylindrical tube taking into account developing flow at the entrance region

Jyh Shyan Lin, Chuen-Tinn Tsai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

This study investigates the effect of developing flow in a circular tube on the thermophoretic particle deposition efficiency using the critical trajectory method numerically. When both flow and temperature are fully developed (combined fully developed), present results agree with previous theories for the long tube where the flow temperature approaches that of the wall. When the flow is fully developed and temperature is developing, it is found that only near the thermal entrance region (or temperature jump region) of the tube the deposition efficiency is slightly higher than the combined fully developed case (flow and temperature), while the deposition efficiency remains the same for the long tube. When both flow and temperature are developing (or combined developing), the deposition efficiency is about twice that of the combined fully developed case for the long tube and is much higher near the entrance of the tube. Non-dimensional equations are developed empirically to predict the thermophoretic deposition efficiency in combined developing and combined fully developed cases under laminar flow conditions.

Original languageEnglish
Pages (from-to)569-583
Number of pages15
JournalJournal of Aerosol Science
Volume34
Issue number5
DOIs
StatePublished - 1 Jan 2003

Keywords

  • Developing flow effect
  • Particle deposition
  • Thermophoretic deposition efficiency

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