Filter abstract IAC2010.pdf (35.52 kB)
Deposition mechanisms and the efficiency of fibrous filters
conference contribution
posted on 2012-12-19, 08:48 authored by Sarah DunnettSarah Dunnett, Charles F. ClementFibrous filters generally consist of many
threadlike fibres oriented more or less normal to the
fluid flow which passes through them. Particles
carried by the fluid flow may impact upon the
fibres and become removed from the flow. The
collected particles accumulate forming complex
structures which influence the fluid flow and
further deposition. Understanding the process of
particle deposition and its effects upon further
deposition are crucial in understanding the
performances of fibrous filters. We have been
developing a numerical model of fibrous filtration
aimed at investigating deposition due to various
mechanisms and the effect filter properties and
particle characteristics have upon it (Dunnett and
Clement 2006, 2009). We have shown that deposit
porosity does not influence further deposition for
small particles where diffusion is dominant, but that
deposition by interception can be strongly enhanced
at high porosity. In this paper we examine which
deposition mechanism is expected to dominate for a
given particle size and flow velocity, and calculate
the deposition efficiency as the deposit builds up.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
DUNNETT, S.J. and CLEMENT, C.F., 2010. Deposition mechanisms and the efficiency of fibrous filters. Abstracts of the International Aerosol Conference, Helsinki, Finland, 29th August-3rd September 2010.Version
- AM (Accepted Manuscript)
Publication date
2010Notes
This is the abstract of a paper delivered at IAC 2010, the International Aerosol Conference, Helsinki, Finland, 29th August-3rd September 2010.Language
- en