Forced convection mass deposition and heat transfer onto a cylinder sheathed by protective garments

Abstract

In chemical, biological, radiological, and nuclear protective clothing, a layer of activated carbon material in between two textile layers provides protection against hazardous gases. A cylinder in cross flow, sheathed by such material, is generally used to experimentally test the garment properties. This is, however, complicated and predictive models are needed. We present a computational fluid dynamics model for the initial phase in which the carbon filter material is not yet saturated. The textiles are modeled as chemically inactive porous layers, the carbon filter particles have been resolved explicitly. The model has been validated against experimental data. We demonstrate that (1) computational fluid dynamics simulations can be used for the efficient design and optimization of protective garments, and (2) the addition of a highly porous active carbon layer highly increases the chemical protection capabilities, while having relatively little negative impact on the thermal comfort of protective garments.

Assessment of airflow and microclimate for the running wear jacket with slits using CFD simulation

“…Recently, in modelling intelligent garment , sports textile (Chowdhury et al 2010) and protective clothing Jiang et al 2010;Talukdar et al 2010;Ambesi et al 2013;Zhu and Zhou 2013;Ambesi et al 2014;Elgafy and Mishra 2014) CFD is adopted and the interaction of liquids and gases with surfaces defined by boundary conditions was simulated (Noca et al 1999;Tanabe et al 2002;Defraeye et al 2011;Cimilli et al 2012). Lim et al (2009) figured out the impact of the different slit positions on the air exchange and circulation.…”