The results of visualization were extensively reported in
our previous studies [5,6]. Examples of the results are
presented in the Appendix. Appendix A1 shows the flow
of smoke into the enclosure through a duct and a port at the
bottom of the box. Appendix A2 shows the flow of smoke
into the enclosure through a port at the half-height of the
box, which is similar to a real-building window.