Table
of Contents
Particle
Deposition on a Loaded FiberProblem Presentation
Outline
Donaldson
Company, Inc.http://www.donaldson.com/
Air
filtration industry
Particles
suspended in air
Particles
suspended in air
Particles
suspended in air
Particles
suspended in air
Particle
Sizes(the most important physical parameter)
PPT
Slide
PPT
Slide
Filter
Systems, Gas Turbine Application
Disk
Drive Filters
Filter
Media(Fibers randomly distributed in a plane normal
to flow direction)
Basic
Filtration Mechanisms
Filter
Efficiency
Performance
parameters for a filter media
Problem
Definition: To Predict Efficiency and Pressure Drop
of a Filter with Polydisperse Fibers.
Problem
Definition: To Predict Efficiency and Pressure Drop
of a Filter with Monodisperse Fibers.
Problem
Definition: To Obtain Flow Field and the Pressure Drop
of a Fibrous Filter ( 3D ).
Problem
Simplification I: To Obtain 2D Flow Field, Assuming
Fibers Are Parallel to Each Other.
Problem
Simplification II: To Obtain 2D Flow Field in a Periodic
Staggered Array of Fibers.
Problem
Simplification II (Continued)
Problem
Simplification III: Assuming the Outer Boundary Is a
Circle of Same Area and Boundary Condition Is Zero Vorticity
(Kuwabara, 1959).
Problem
Simplification III (Continued)
Dendrite
structure, particle deposition in a filter
Modeling
of filter performance
Some
thoughts on the dendrite structure
Numerical
Approach, MonteCarlo Simulation(e.g. Kanaoka et al.
1983)
Problem
Workshop on Math Problems in Industry ‘98Rensselaer
Polytechnic Institute
Particle
deposition on a clean fiberdue to Interception
Particle
deposition on a loaded fiberdue to Interception (Kanaoka
et al. 1986)
Why
“bunny ear”?
A
2D Continuous ApproachWorkshop on Math Problems in
Industry ‘98Rensselaer Polytechnic Institute
A
2D Continuous Approach (Continued)
Various
other assumptions usedWorkshop on Math Problems in
Industry ‘98Rensselaer Polytechnic Institute
Summary
