chamber. A stirring fan was placed at the bottom of chamber to
increase the momentum inside the small test chamber along with a
porous table for providing uniform airflowgenerated by the stirring
fan to the test specimens. The stirring fanwas modeled as being the
same size as the porous table, 0.21 m (x) 0.21 m (y), and the
vertical velocity of the stirring fan was uniformly fixed. The outline
and boundary of this chamber is designed to correspond to ISO
16000-23 and -24.