In the following video, the camera is focused on a thin cross-section through in the middle of the WFO. The fire is to the left. I have just placed a fresh chunk of wood on the fire. What is most noticeable in this clip (watch at the highest quality possible) is the swirling of the smoke. This is part of some tests I've been running to test the effect of raising the deck to bake pizza closer to the dome.
Unfortunately, YouTube compression obscures some of the detail, but I hope you can still see the chaotic flow.