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| Flame In Zero Gravity |
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| Flame In Zero Gravity Upside Down |
Another flame upside down.
A temperature gradient is set up around the center of the flames, temperature decreases by \(\cfrac{1}{\sqrt{x}}\), spherically around the center.
One possible explanation is that \(g_{T}\) drives all the reactants beyond the hot zone before they have a chance to combust. Under normal gravity reactants at the top are slowed by gravity and remains in the hot zone longer. They combust, releasing even more energy and raise the temperate further. \(g_T\) increase further (before \(\Delta d_s = d_n\)), in this top region and the result is an elongated flame upwards.
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| Flame Under Normal Gravity |
The bottom part of the flame where most of the reactants escape resembles the blue flame in zero gravity.
In the second picture, where the flame is upside down under zero gravity, some of the reactant bounced off the top hard surface and re-enter the hot zone. Further combustion causes the color change inside.
Have a nice day.
