Natural Convection in a Differentially Heated Square Enclosure with a Solid Polygon

Figure 4

Heatlines for different polygons to enclosure area ratio 𝐴 and number of polygon sides 𝑁 at 𝐾_𝑟=1.0, 𝑋₀=0.5, and Ra=10⁵.

(a) 𝑁=3

(b) 𝑁=4

(c) 𝑁=5

(d) 𝑁=∞