2026-10-12T02:19:51Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34018494 2026-09-28T21:06:09Z category_7 category_12 category_15 category_21 category_873 category_64 portal_87 item_type_3 month_year_09_2026

Effects of geometrical parameters on eccentric cylindrical differential mobility analyzer Chengbo Zhou (4914898) Yuan Wei (307030) Yueyan Liu (809030) Dongmei Chen (124974) Xujuan Li (3176880) Tao Zhang (43681) Mingzhou Yu (809029) Medicine Cell Biology Neuroscience Biotechnology Chemical Sciences not elsewhere classified Cancer Kihong Park <p>The Differential Mobility Analyzer (DMA) is a core instrument for classifying aerosol nanoparticles. Alsharifi and Chen (Aerosol Science and Technology, 2019) established a critical framework for analyzing axially eccentric DMAs and quantified the pronounced influence of geometric parameters on the transfer function under a defined set of design conditions. Building upon their essential findings, this work extends the investigation by systematically examining the effect of geometrical parameters across a comprehensive range of eccentricity levels. Through coupled numerical simulations of flow field, electric field, and particle dynamics, we demonstrate that increased eccentricity consistently degrades classification performance by reducing the transfer function peak and broadening its full width at half maximum (FWHM). More critically, the sensitivity of these metrics to specific geometric variations is highly parameter-dependent. A key finding is that at an eccentricity of just 2%, the transfer function undergoes a transition from a single to a double peak, which severely impairs classification efficiency. This study thus quantifies the performance boundaries of DMA design and provides actionable guidance for achieving the high-precision coaxial alignment essential for accurate particle sizing.</p> <p>Copyright © 2026 American Association for Aerosol Research</p> <p></p><p>Axial eccentricity triggers a transition in DMA transfer function from single to dual peak.</p><p>A 2% eccentricity threshold emerges as a critical limit for sizing accuracy.</p><p>Optimized geometry (aspect ratio, radial clearance, analyzer length) mitigates resolution loss under eccentric conditions.</p><p></p> <p>Axial eccentricity triggers a transition in DMA transfer function from single to dual peak.</p> <p>A 2% eccentricity threshold emerges as a critical limit for sizing accuracy.</p> <p>Optimized geometry (aspect ratio, radial clearance, analyzer length) mitigates resolution loss under eccentric conditions.</p> 2026-09-28T21:06:09Z Dataset Dataset 10.6084/m9.figshare.34018494.v1 https://figshare.com/articles/dataset/Effects_of_geometrical_parameters_on_eccentric_cylindrical_differential_mobility_analyzer/34018494 CC BY 4.0