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PhD-TW Colloquium June 10, 15:4516:45, Citadel H327
 

Summary: PhD-TW Colloquium
June 10, 15:4516:45, Citadel H327
Speaker 1:
Lilya Ghazaryan
on
Simulation of Impaction Filtration of
Aerosol Droplets in Porous Media
Driven by various applications, several approaches have been developed to determine the filtration
efficiency of particulate filters. Our aim is to simulate the particle filtration efficiency of several basic
structured porous media under a number of flow conditions and to quantify the role of the particle's
inertia on filtration. This is a steppingstone problem towards the analysis of realistic systems of porous
filters.
Particle motion is governed by a variety of forces. Here, we focus on the dominant drag-force dynamics
to quantify the filtration efficiency as a function of the droplet inertia, expressed in terms of its
relaxation time. Filtration of a droplet is assumed to arise whenever this droplet hits the surface
of the porous medium. The immersed boundary method is applied to capture the detailed particle
motion in the gas flow through a complex porous medium. The flow field is calculated by solving
the incompressible Navier-Stokes equations. For the particle phase the Lagrangian approach is used,
in which we track the trajectories of a large number of particles embedded in the flow. The porous
medium is formed by a staggered arrangement of square rods in 3D in order to develop and validate

  

Source: Al Hanbali, Ahmad - Department of Applied Mathematics, Universiteit Twente

 

Collections: Engineering