Thermophoresis deposition studies for NaCl and diesel exhaust particulate matter under laminar flow
Deposition of fine particles is acknowledged as a concern in various processes. Previous studies have investigated thermophoretic transport for various flow regimes (~30 o C and 425 to 580 o C. An experimental setup was developed to study thermophoretic deposition for particles near ~1@?m size, in the 170 gas o C temperature range, similar to the conditions of exhaust from the diesel engine used in the present study. NaCl test aerosols (Mass mean diameter (MMD) 0.32 and 0.61@?m), and diesel exhaust particles (MMD 0.44, 0.35 and 0.29@?m) were used at gas inlet temperatures of 170, 260 and 360 o C, and 400 p ) value of 0.5Wm -1 K -1 for engine exhaust particles in the model, was found to best match with the experimental observations. For both kinds of particles, the model developed in the present work performed as well as other existing models in the literature.
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