TY - JOUR
T1 - Influence of Local Airflow on the Pollutant Emission from Indoor Building Surfaces
AU - Topp, Claus
AU - Nielsen, Peter Vilhelm
AU - Heiselberg, Per Kvols
PY - 2001
Y1 - 2001
N2 - This article reports the results of an investigation, based on fundamental fluid dynamics and mass transfer theory, carried out to obtain a general understanding of the mechanisms involved in the emissions from building materials in ventilated rooms. In addition, a generally applicable method for the prediction of surface emissions is proposed. The work focused on the emission of vapours and gases and no particulate emissions were considered. The methods used were numerical calculations by computational fluid dynamics (CFD) and full-scale laboratory experiments. It was found that the emissions are a strong function of air-change rate, local air velocity and local turbulence, as the mass transfer coefficient increases in proportion to these parameters. The findings further show that the mass transfer coefficient increases in proportion to the velocity when the emission is controlled by evaporation from the surface. With regard to diffusion-controlled emissions, the mass transfer coefficient is unaffected by the velocity.
AB - This article reports the results of an investigation, based on fundamental fluid dynamics and mass transfer theory, carried out to obtain a general understanding of the mechanisms involved in the emissions from building materials in ventilated rooms. In addition, a generally applicable method for the prediction of surface emissions is proposed. The work focused on the emission of vapours and gases and no particulate emissions were considered. The methods used were numerical calculations by computational fluid dynamics (CFD) and full-scale laboratory experiments. It was found that the emissions are a strong function of air-change rate, local air velocity and local turbulence, as the mass transfer coefficient increases in proportion to these parameters. The findings further show that the mass transfer coefficient increases in proportion to the velocity when the emission is controlled by evaporation from the surface. With regard to diffusion-controlled emissions, the mass transfer coefficient is unaffected by the velocity.
KW - Local airflow
KW - Pollutant Emission
KW - CFD
KW - Full-Scale Experiments
KW - Evaporation Controlled
KW - Diffusion Controlled
U2 - 10.1034/j.1600-0668.2001.011003162.x
DO - 10.1034/j.1600-0668.2001.011003162.x
M3 - Journal article
SN - 0905-6947
VL - 11
SP - 162
EP - 170
JO - Indoor Air
JF - Indoor Air
IS - 3
ER -