A Simple Method for Aerosol Transport Efficiency Tests in Sampling Tubes

To obtain representative data, particle loss in sampling tubes must be minimal; otherwise, the magnitude of losses known so it can corrected. Since sample occurs through various mechanisms and depends on size, airflow velocity, Reynolds number, there is no simple method to predict multitudinous configurations tubes. This study aims present a for experimentally determining as function sizes. Moreover, applicability existing models verified experimentally. An ultrasonic atomizing nozzle was used generate micrometer-sized polydispersed particles challenge aerosols. Following charge neutralization, size distribution number concentration upstream downstream are measured by an Aerodynamic Particle Sizer. The with inner diameters 4.5, 7.7, 10 mm at values Re (500~5000) tube orientations (horizontal vertical). Both horizontal vertical have lowest approximately 2100. Gravitational settling turbulent-induced inertial impaction main deposition aerosol transport large than 1 μm. Gravity plays significant role when less 5000, then its dominant position gradually replaced turbulence continuing increase. Further, efficiency increased increasing diameter. Consequently, each needs tested according methods mentioned this fully grasp tube.