Direction of fluid flow and the properties of fibrous filters

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Aerosol Science and Technology; (United States)

DOI:https://doi.org/10.1080/02786829108959524· OSTI ID:5706645

Pich, J; Spurny, K

The influence of the fluid flow direction (downflow and upflow) on the filtration properties of filters that have a fibrous structure is investigated. It is concluded that selectivity of these filters (dependence of the filter efficiency on the particle size) in the case of upflow is changed - in comparison with the case of downflow - in three ways: the position of the minimum of this dependence is shifted to larger particle sizes, and the whole selectivity is decreased and simultaneously deformed. Corresponding equations for this shift and changes are derived and analyzed. Theoretical predictions are compared with available experimental data. In all cases qualitative agreement and in some cases quantitative agreement is found.

• OSTI ID: 5706645
• Journal Information: Aerosol Science and Technology; (United States), Vol. 15:3; ISSN 0278-6826
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
FILTERS
PHYSICAL PROPERTIES
AIR POLLUTION MONITORING
EFFICIENCY
FILTRATION
FLUID FLOW
PARTICLE SIZE
MONITORING
SEPARATION PROCESSES
SIZE
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)