Abstract
A two-step Taylor-Galerkin finite element method with flux corrected transport algorithm (FEM-FCT) is used to calculate the flow field of a highly underexpanded two-dimensional planar symmetric impinging jet. The flow field thus obtained is used to calculate trajectories and collection efficiencies for ultrafine droplets in the areosol jet. The performance of the FEM-FCT algorithm for this problem is noted. The effects on particle collection efficiencies of the pressure ratio, absolute downstream (or upstream) pressure, and the ratio of the nozzle-to-plate distance to the nozzle width are investigated. A modified Stokes number taking into account of the non-continuum flow effects and non-Stokesian particle drag is used to characterize the impaction process.
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