Performance of a fiber length classifier.
Baron-PA; Gao-P; Deye-GJ; Maynard-AC
J Aerosol Sci 1998 Sep; 29(Suppl 1):S11-S12
A differential mobility classifier that separates fibers according to length using dielectrophoresis has been constructed and used for several applications (Baron et al. 1994; Baron et al. 1998). The performance of the classifier was predicted using a two dimensional axi-symmetric model of the flow field and then calculating particle trajectories for a variety of conditions. Based on the flow calculations (e.g. Figure 1), several regions of the classifier were improved to reduce likelihood of turbulent losses. For a given total flow through the classifier and a maximum voltage across the electrodes, the performance of the classifier was found to depend on the ratio of the aerosol flow to the inner and the outer sheath flows. The minimum classifiable length, the minimum length distribution width, and the throughput of classified fibers could each be optimized, but not independently.
Fibrous-dusts; Aerosol-sampling; Sampling-equipment; Sampling-methods; Sampling; Analytical-instruments; Air-flow; Equipment-reliability; Performance-capability
National Institute for Occupational Safety and Health, U.S. Centers for Disease Control and Prevention, Cincinnati, OH, 45226, U.S.A
Journal of Aerosol Science