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Expert in Fluid Filtration
Available for your Consulting and Expert Witness Needs
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Summary of Expertise:
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Listed with other top experts in: |
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Expert has applied his background in chemistry and chemical engineering to become an expert in a variety of filtration operations. He can help clients develop a filter medium or simply select the right one. He is familiar with the anatomy of a filter medium (membrane, paper, fibrous mat, or a thick-walled tube or "candle").
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Expert understands the meanings of fluid permeability, the flow-average pore size, and how those values (with the thickness of the medium) affect filtration efficiency. He has also studied how, in fibrous mats, permeability and pore size fall with increased packing density. Expert has authored three books on various aspects of fluid filtration (see Selected Publications) and can answer questions on liquid filtration equipment and systems.
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Expert can explain how filtration efficiency changes with fluid velocity, viscosity, and certain electrical aspects, along with the very natures of the fluid, the particles, and the medium itself. He understands the symptoms of sieving versus adsorptive filtration.
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Expert is knowledgeable of filtration test methods used to evaluate filter media meant to sterilize streams in the pharmaceutical industry, maintain clean streams in general (including drinking water), and recover solids from a stream. He understands how to measure the capacity of a filter medium and can explain the four different filtration "laws" applied to measuring the rate at which the medium looses permeability (plugs with collected solids, or the filter cake reaches a certain thickness). He is familiar with how those laws are applied to three different schemes of filtration: constant flow, constant driving pressure, and variations in both (as with a centrifugal pump).
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Expert can advise on increasing the filter capacity with the use of filter aids (particles or fibers) added to the feed stream, or precoated on the filer medium, or both.
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Knowledgeable of the different meanings of particle- and pore sizes, Expert can explain the three different meanings of the average-size pore and the importance of pore-size distribution. He is familiar with the different ways of describing filtration efficiency, the expressions used, and the meanings of "absolute" filtration, the "largest" pores, the bubble point, and the "micron" rating.
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Experienced in cross-flow filtration, Expert understands the importance of knowing the pressure applied to four points along the three streams.
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Expert's background in process-engineering filtration is extensive. He also has experience in microwave drying, scrubbing towers, distillation, heat transfer, polymerization, catalyst preparations, organic synthesis, and electrochemical reactions. He is also experienced in employing statistical methods to analyze data, by engaging the classical, continuous, and discrete random distributions.
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Recently, Expert conceived of a new process for producing a fluid-filter cartridge using a thick-wall tube of resin-bonded cellulose fibers. He also led an R&D team in building membrane filter cartridges and brought new insight into membrane filtration via published papers and talks. Expert can answer questions on hydraulic fluid filters, pleated cartridge filters, leaf filters, and a variety of air and dust filters.
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Expert has experience (and publications) in the liquid filtration of particles as small as 0.5 micrometers (the smallest size seen by automatic particle counters that analyze liquids). He also has experience with investigators who fail to operate a particle counter correctly and thus obtain misleading results of comparing the particle-size distribution in feed stream to that of the filtrate. Expert has knowledge of gas filtration of smaller particles and of ultrafiltration membranes.
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Expert has experience with the manufacture and test of cartridge filters meant to provide safe drinking water (by removing suspended solids and by absorbing dissolved impurities) and sterile liquids and gases (by stopping microbes). In addition, his background includes the management of a 10-million gallon/day water treatment plant.
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Expert has laboratory experience employing a vacuum to the filtrate side of a medium simply as a way of providing fluid driving pressure. This is not a recommended procedure for a volatile liquid. He has knowledge of the operation of a commercial-size, rotary, vacuum drum.
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Expert understands through experience that the efficiency with which an activated carbon will collect dissolved materials from a liquid or gas depends on the relationship between the carbon and the item to be separated, along with temperature, fluid flow rate (the residence time of contact), and the numbers of collection sites on the carbon
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Expert understands from experience that the efficiency with which solids are separated from a gas by a filter medium depends on many factors, such as: fluid residence time, i.e, gas flow rate vs thickness of the medium; the nature of the thickness,i.e. pore sizes and internal area; along with any electro-attracion of the medium for the solids. The most difficult particle diameter to filter lies near 0.3 microns; hence tests to evalute a filter mediun employ those size particles. To characterize a filter medium, measure the porosity (void volume), the thickness, and the ratio of air flow rate vs. driving pressure. These measurements lead to understanding the internal surface area. The pore-size distribution in a thin layer of a randomly built filter medium follows a gamma distribution. That is, the ratio of the standard deviation of pore diameters to the mean is fixed, no matter the value of the mean.
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Expert knows from experience how to distingwish between viscous air flow through a porous material, inertia flow, and Knudsen flow, the later seen with with small pores. Learning the viscous permeability of a porous material (along with thickness and void volume) leads to a full characterization of the medium.
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Show Secondary and Basic Areas of Expertise | Localities:
Expert may consult nationally and internationally, and is also local to the following cities: Raleigh, North Carolina;
Greensboro, North Carolina;
Durham, North Carolina;
Winston Salem, North Carolina;
Fayetteville, North Carolina;
Cary, North Carolina;
High Point, North Carolina;
Greenville, North Carolina;
Concord, North Carolina;
and Lynchburg, Virginia.
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Degree |
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Institution |
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1948
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BA
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(requirements BS Chemistry)
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Miami University, Oxford,Ohio
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Responsibilities |
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1992 to
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Independent Consultant
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Advised a variety of people with filtration problems. Taught the understanding of that unit process. Author of three books on filtration, editor of a fourth. Review papers for tech journals
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1980 to 1992
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Ametek, Inc.
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Senior Project Engineer
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Conceived new process for making thick-wall tube of resin-bonded cellulose fibers. Designed and operated commercial plant. For 15 years chaired an ASTM Committee on filtration
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1978 to 1980
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Gelman Sciences
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Manager, Product Testing
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Led team in building membrane filter cartridges. Brought new insights into membrane filtration via many talks and publications
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1972 to 1978
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Commercial Filters
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Senior Development Engineer
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First position in filter business. Published papers. Began Chair of ASTM group.
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1967 to 1971
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Kimberly-Clark Corporation
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Research Chemist
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Designed and operated a gas-diffussion electrode. Granted on cell.
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1960 to 1967
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Chemstrand Research Center
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Research Chemist
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Designed,operated pilot plant to produce polyester fiber. Patent on polymerization of THF
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1953 to 1960
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PPG Industries
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Research Chemist
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Developed process for producing hydrogen peroxide, 3 patents
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1951 to 1953
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U.S. Army
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1st Lt , Chemical Corps, Company Exec
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Led the only 48-man smoke generator platoon supporting combat on the central front, Korea.
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Associations/Societies
Expert is a member of the American Chemical Society, the American Institute of Chemical Engineers, and the American Filtration and Separation Society. He is a Fellow of the American Society of Testing & Materials.
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Licenses/Certifications
Expert is a licensed P.E. in North Carolina, Wisconsin, Indiana
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Professional Appointments
Expert is a member editorial board of Filtration News and Fluid/Particle Separation J.E
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Awards/Recognition
Expert has published three dozen papers on filtration, and still writing. He holds four patents and is the author of three books on filtration and editor of a third.
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| Publications: |
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Selected Publications and Publishers
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- www.talloaks.com
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- Interpharm Press
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- Gulf Publishing
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- American Society of Testing and Materials (ASTM)
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- www. LLH-publishing.com
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| Selected Consulting Examples: |
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Expert consults on the concepts of filtration and analyses of filter media as well as how a given medium performs depending on variables.
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Recent Client Requests:
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Expert for consulting on Recovering exfoiiated carbon nanotubes from a low pH aqueous solurry.
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Air flow expert needed for consulting on an absorbent scrubber design.
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Expert for consulting on Removal of Large Particle Contamintes.
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Expert to consult in nanoparticle isolation and purification,.
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Expert for consulting on Water purification and surface enhancements for membranes.
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Vacuum systems expert for consulting on Improving the Existing Vacuum Filtration Process.
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Expert in water filtration and point of use filtration media, activated carbon and other adsorbents development.
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Click the green button above to contact
Expert for a free initial screening call regarding your expert consulting needs.
Expert is available for consulting to corporate, legal and government clients.
Remember, your initial screening call to speak with
Expert is free.
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Recent Litigation Client Requests:
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Water filter expert for consulting on granular activated carbon water filtration technology.
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Expert in polymers.
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Water filter expert for consulting on toxic leak of petro chemicals into well water.
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Carbon water filter effectiveness expert witness for consulting on effectiveness of Culligan carbon filter in removing benzene and toluene.
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Click the green button above to contact
Expert for a free initial screening call regarding expert testimony,
litigation consulting and support, forensic services, or any related expert witness services.
A few litigation needs include product liability, personal injury, economic loss, intellectual property
(patent, trademark, trade secret, copyright), and insurance matters. Remember, your initial screening
call to speak with
Expert is free.
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| Additional Skills and Services: |
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Training/Seminars
Expert has presented many technical papers and chairs the ASTM group developing many test methods.
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Supplier and Vendor Location and Selection Expert has experience in locating vendors of:
* Process equipment
* Filter media
* Testing labs.
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Education
