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

Ambesi, D.; Kleijn, C.R.; Den Hartog, E.A.; Bouma, R.H.B.; Brasser, P.

doi:doi:10.1002/aic.14246

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

Title

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

Author

Ambesi, D.
Kleijn, C.R.
Den Hartog, E.A.
Bouma, R.H.B.
Brasser, P.

Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Date

2013-10-21

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.

Subject

chemical
biological
radiological
and nuclear protective garments
cylinder
active carbon filter
heat transfer
mass transfer
computational fluid dynamics
turbulence
time-dependent Reynolds-averaged Navier-Stokes