from the videos I've seen (small candle scale), it's spherical.
Granted they were doing small scale tests with purposefully low turbulence.
In micro-g hot air doesn't rise (it just expands in place), so there is no natural convection effect to bring in new O2. You have to depend on air turbulence (or outside current generation) to bring in fresh oxygen.
[a few google searches later... ] well I can't find the video, but I found a good image:
http://science.nasa.gov/science-news/sc ... st12may_1/
ETA -
ok, more of a combustion than a burn, but it shows the effect:
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy
Granted they were doing small scale tests with purposefully low turbulence.
In micro-g hot air doesn't rise (it just expands in place), so there is no natural convection effect to bring in new O2. You have to depend on air turbulence (or outside current generation) to bring in fresh oxygen.
[a few google searches later... ] well I can't find the video, but I found a good image:
http://science.nasa.gov/science-news/sc ... st12may_1/
ETA -
ok, more of a combustion than a burn, but it shows the effect:
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy