EI Gas Area Spacer Desiccant Frame hot Side cold side air motion inside air gap is parallel to gloss panes in vertical direction Cup & down) gloss air pone 1 gap gloss Pone Consider a double pane window with air between the two panes. The width of the window is 50 cm, the height 1 m, and the separation between panes is 12 mm. The temperature difference between the two glass panes induces vertical motion of the air inside as indicated in the schematic Calculate the Peclet number of the air inside the gap. Use the window height as characteristic length. The characteristic velocity of air is 30 mm/s. The thermal diffusivity of air is 30E-6 m2/s