Prof.Li-Zhi Zhang
Li-Zhi Zhang is a Professor at South China University of Technology (Guangzhou, China). He has worked with energy recovery and heat and mass transfer topics and advanced humidity control technologies since 1992.
"
Modeling of dynamic deposition and filtration processes of airborne particles
by a single fiber with a coupled lattice Boltzmann and discrete element method"
Airborne
particulate matter (PM) pollution has caused many deleterious effectson atmospheric environment and people’s health.
Fiberfiltrationhas been regarded as one of the efficient and economical way for
removing particles from gas streams. To reveal the dynamic capture processes of
airborne particlesby fibrous filters, and their effects on filtration
performance, a lattice Boltzmann modeling approach coupled with discrete
element method (LB-DEM), is used for simulations of airborne particle deposition
on an individual fiber. Themutual
influences between the dynamic particle transport/deposition and the fluid flow
are considered. The model well predicts the formation of the dendrites and the
dynamic progression of the deposit under different capture mechanisms.
The adhesion parameteris proved to have a dominant effect on the dynamic
deposition processes and filtration performance. Increases in adhesion
parameter lead to looser particle dendrites, faster deposition rates and better
filtration efficiencies. The smallerparticles tend to have larger pressure
drops and more compact dendrite structures at the same deposition mass.