Hot Topics: Leading Universities

9:30 A.M. - 12:00 P.M.
Moderator: Bob Burkhead, Blue Heaven Technologies

Current Academic Research
Da-Ren Chen, Ph.D., Washington University

Advanced High Temperature Melt Blown Polyphenylene Sulfide Filter Media
Larry C. Wadsworth, Ph.D., University of Tennessee
It has been demonstrated that a newer commercial grade of polyphenylene sulfide (PPS), which was especially designed for melt blowing (MB), has good MB processing attributes and can be produced in a wide range of basis weights, fiber diameters, and filtration performance for different end-uses. The MB PPS webs show promise for use as automotive air and fuel filters under the hood, as engine exhaust filters, and in bag houses.

Simulating Multifilament Woven Filters
H. Vahedi Tafreshi, Ph.D., NCSU, Nonwovens Cooperative Research Center
Previous computational studies in simulating woven filters are merely focused on the monofilament woven fabrics. In this study, a realistic model of woven fabrics made of multifilament yarns is generated. The filaments are assumed to have identical diameters and tightly packed in hexagonal configurations. The filter performance is simulated by numerically solving the Navier-Stokes equations. The effect of the Solid Volume Fraction (SVF) of the fabrics and yarns is simulated and discussed in detail with respect to the available data in the literature.

Nanoparticle and Nanofiber Filtration: Modeling and Experiments
David Y.H. Pui, Ph.D., University of Minnesota
A systematic study of nanoparticle and nanofiber filtration has been conducted. Nanoparticle penetration through standard filters and nanofiber (150 nm diameter) web filters were evaluated in the size range from 3-20 nm. The experimental results are compared with models developed for nanoparticle/nanofiber filtration.

Computer Program for Optimizing the Nanofiber - Microfiber Mixture of a Depth Filter
George Chase, Ph.D., University of Akron (OH)
This program uses an optimization algorithm to determine the optimum design parameters such as filter thickness, porosity, and fiber diameters.

Air Tutorial

1:00 P.M. - 3:00 P.M.
Moderator: Chris Peart, Ahlstrom Corporation

Efficiency and the Total Cost of Ownership of Air Filtration
Don Thornburg, Camfil Farr USA
Discusses methods for determining actual filtration efficiencies in service and the total cost of operation of air filters.

Air Filter Design and Development
Christopher A. Donatelli, Keystone Filter Division/Met-Pro Corporation
This presentation will cover the quotation process, prototype development and ensuing production process.

Modeling Air Filtration via Fibrous Filters
H. Vahedi Tafreshi, Ph.D., NCSU, Nonwovens Cooperative Research Center
Fibrous filters are generally characterized by their collection efficiency and pressure drop. In this study, a virtual 3-D web is generated based on the fiber orientation information obtained from analyzing microscopic images of lightweight spun-bonded filter media. The filter’s pressure drop is computed by solving the air flow field in the filter and is found to be in excellent agreement with experimental data. Monitoring the trajectory of nanoparticles in the media, collection efficiency of the filter is predicted for different air face velocities and particle diameters.

Sub-micron Fiber Based Synthetic HVAC Media Performance without Electrostatic Enhancement
David C. Jones, DuPont
The use of electrostatically enhanced filter media is widespread in HVAC filtration and has been subject to questions concerning the ability to maintain performance throughout the life of the filter due to charge dissipation. The ability to produce continuously spun sub-micron fibers without an induced electrostatic charge can offer an alternative to discrete fiber wetlaid nonwovens in applications ranging between F6-F10 while maintaining rated efficiency throughout the life of the filter and offering a superior resistance to efficiency ratio.

Liquid Tutorial

Moderator: Mitch McCreary, BBA Fiberweb
3:15 P.M. - 5:30 P.M.

Using Computer Modeling for Liquid Filtration
Anirudda Mukhopadhyay, Fluent, Incorporated
Flow modeling of filtration equipment is a great troubleshooting and design analysis tool. Recent developments at Fluent have contributed in enabling the modeling technologies to reduce time-to-market for new filter designs.

Fundamentals of Liquid Filtration and Demonstration
Susan Goldsmith, IBR
Learn the fundamentals of liquid filtration and see how it works.

Liquid Filtration Media – Voice of Technology
Yogeshwar K. Velu, Cummins Filtration
This paper deals with the use of filter media (synthetic and cellulose) in liquid filtration applications. Filter media have to meet tougher standards to satisfy the new emission regulations. The characteristic of the media that is needed to meet the emission standards is examined.

The Potential of Spunlaced Filter Media - in Hot Gas, Dry and Liquid Filtration
André Lang, Jacob Holm Industries (Germany) GmbH
Thanks to the variety of fibers which can be used to manufacture spunlaced filter media, their special texture and good filter performance, hydroentangled nonwovens offer a huge potential for hot gas, dry and liquid filtration.

Program subject to change. The opinions expressed at Filtration 2006 are those of the speakers and not necessarily that of INDA or its Board of Directors.