TITLE:
Modeling Submicron Particles Collection in Laminar Forced Convection Gas Flow by a Rectangular Venturi Scrubber
AUTHORS:
Serge Wendsida Igo, Kokou N’wuitcha, Belkacem Zeghmati, Xavier Chesneau
KEYWORDS:
Venturi Scrubber, Submicron Particles, Diffusion, Laminar Flow, Collect Efficiency
JOURNAL NAME:
Open Journal of Air Pollution,
Vol.5 No.1,
March
14,
2016
ABSTRACT: Venturi
scrubbers are usually used for large particles cleaning in turbulent gaseous
flow. In this work, submicron particles scrubbing in laminar forced convection
dusty air flow in a rectangular venturi scrubber have been numerically
simulated. Hydrodynamics effects and scrubbing process are investigated in
detail. Results are presented as flow velocity, axial pressure, streamlines
pattern, particles and droplets mass fraction profile, and collect efficiency.
They show that venturi scrubbers can be efficient for submicron particles
scrubbing. In fact, a better collect efficiency is obtained at high
particles-droplets residence time, high ratio droplets concentration/particles
concentration, low venturi diameter ratioand low Reynolds numbers. There is a
critical Reynolds number value for which the collect efficiency becomes very
low and tends to be constant.