Get a cheap cyclindrical glass container, and cut out the bottom. Place it over that fire, and you'll have a much taller flame, more complete combustion (=hotter), a rocket stove effect, and more heat radiation. If you are able to create circular airflow you can create a gorgeous fire vortex.
Thank you for watching and commenting. Thank you for your interesting opinion. However, I cannot find a cylindrical container that is cheap and the right size at the moment. I would like to try it if I have a chance in the future Please keep watching. Thank you very much.