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This study is performed as a part of the research that examines the emission and diffusion characteristics of volatile organic compounds (henceforth VOCs etc.) from indoor building materials. In this paper, flow and the emissions field of a VOC from the surface of building materials in FLEC (Field and Laboratory Emission Cell) Cavity are examined by 2-D CFD analysis. Three types of emission phenomena from building materials are studied here; (1) emission through internal diffusion, (2) emission through external diffusion and (3) the one through mixed diffusion material (internal +external) . With a total ventilation rate of 200 ml/min, air velocity near the test material surface rangs from 0.1cm/s to 0.8cm/s. In the case of internal diffusion material, FLEC works well. However, in the case of evaporation type (external diffusion) materials, or mixed material (internal+external) when the thickness of wallpaper (internal) is thin, FLEC is not suitable for the emission testing.

2D-CFD ANALYSIS OF FLOW AND DIFFUSION FIELD IN FLEC AND PREDICTION OF VOCs EMISSION RATE