Numerical study of the human walking-induced fine particles resuspension

One of the main sources pollution in indoor environments is human walking-induced particle resuspension. In this work, airflow and resuspension particles smaller than 1 ?m generated by foot tapping were investigated numerically using ANSYS CFX software. The k-? shear stress transport model was considered to simulate unsteady field around under shoe. immersed solid method then used incorporate shoe a three-dimensional computational domain. Particle predicted means Rock ‘n’ Roll model. effects walking speed groove pattern (transverse grooves, longitudinal grooves no groove) studied. Three different selected particle-substrate combinations (ATD-linoleum, PSL-linoleum alumina-steel) tested. numerical simulations showed that air below ejected as high velocity jet. After hit ground, counterrotating vortices formed results compared with previous experimental works, good agreement found. Results shown for studied cases fraction ranges over four orders magnitude, from 10 ?5 ?1 . fractions increased size speed. However, significant influence patterns observed. • Human step resuspended sizes ranging 0.1 ?m. Resuspension magnitude (from ). Particle-substrate combination considerably Shoe have on