If the bell had a round shape

I am a newbie here and I have a crush on round shape.
My design would be a 180 degrees spiral staircase around a batch box rocket stove.
I did some drawings with a rectangle stove with 2 bells, it’s ok but it would fit more with a round shape.
Any hint on that? I am not stuck with the batch rocket idea. Any efficient stove are interesting.

Hi Gabriel;   A bell can be any shape you like!  Round is no problem.
Your bell can be made from bricks or it can be metal with a brick covering.
Your batch core can be built into your bell what ever shape it is!

Ok! So the shape of the bell does not affect efficiency. The gaz go up and slowly go down as it cool down, whatever the shape. Interesting then...my project may not be that crazy after all. I love the way creativity can get in the construction of a stove like that.

can you share some of the drawings?
I like the idea of the spiral stair around the bell.
my question is, though, is  the bell going to be attached in any way to the treads of the stair?
as in, is the bell supporting the stairs, or are they just running around without contact?

I guess its just a mechanical interest on my part, I was thinking the heat might eventually weaken the metal bell and interfere with the stair.
If the bell were made of sturdy enough material, then metal stair treads or tread supports might even act as radiator fins to help disperse the heat.