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A novel method of aerosol particle filtration using liquid bridges
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Kurtyigit, Ismail Erdi. A novel method of aerosol particle filtration using liquid bridges. Retrieved from https://doi.org/doi:10.7282/t3-z3sq-wv32

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TitleA novel method of aerosol particle filtration using liquid bridges
NameKurtyigit, Ismail Erdi (author); Drazer, German (chair); Drazer, German (member); DeMauro, Edward (member); Shan, Jerry (member); Mainelis, Gediminas (member); Rutgers University; School of Graduate Studies
Date Created2023
Other Date2023-05 (degree)
SubjectMechanical engineering, Air -- Purification, Aerosols -- Purification
Extent149 pages : illustrations
DescriptionAir pollution has been a major concern in recent years, and filtering air of particulate matter is a way to reduce its negative effect on human health. A common way to filter particle pollution relies on using fibrous filters. In this work, we propose and investigate a novel filtration idea where the solid fibers of a conventional fibrous filter are replaced by liquid bridges that act as aerosol collectors. We create cylindrical liquid bridges between parallel plates that are separated a constant aperture by spacers. We first determine the critical flow conditions for which individual stationary liquid bridges, made of water or polyethylene glycol (PEG), can sustain air crossflow without large deformations or breaking up. We then investigated the inertial capture of aerosol droplets suspended in a crossflow by liquid bridges created between two silane-treated glass slides using PEG. We track the motion of individual aerosol water droplets (3-9 μm in size) suspended in a flow moving across single or two-bridge systems, using high-speed imagining connected to a microscope. First, we obtain the inertial impaction efficiency of an isolated liquid bridge collector as a function of the Stokes number of the aerosol particles and demonstrate that it is equivalent to that of a solid cylindrical collector. We then consider two-bridge systems; two parallel cylindrical collectors oriented perpendicular to the flow. We investigate the effect that the upstream collector has on the effective impaction efficiency of the downstream test collector, depending on the transverse offset between collectors and Stokes number. We demonstrate that, as predicted by numerical simulations based on potential flow theory, optimum values of the transverse offset lead to effective efficiencies that are larger than the efficiency of an isolated bridge. The relative increase in the inertial capture efficiency is significant for Stokes numbers around and below unity, with relative gains as large as approximately 50%. These results demonstrate the importance of the relative arrangement of individual collectors on the overall inertial capture efficiency of aerosol particles. We finally design a high-performance filtration system consisting of periodic arrays of liquid bridges in a staggered configuration, using relative transverse offset values studied in the two-collector systems. We measure the concentrations of various sizes of water droplets, ranging from 0.5 to 10 μm, before and after the filtration system and determine the filtration effectiveness. The results suggest that decreasing the transverse offsets yields higher collection efficiency for a given Stokes number. We also show that for a given transverse offset, increasing the Stokes number improves the efficiency significantly. This dissertation proves that this unique filtration technology can substantially contribute to aerosol filtration.
NotePh.D.
NoteIncludes bibliographical references
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-z3sq-wv32
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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