# Why can't you blow out a smouldering reaction?

It's possible to blow out a candle flame so how come once it's blown out, if the wick is still smouldering, blowing on it just makes it glow brighter instead of stopping the smouldering reaction.

Under these conditions, the equilibrium temperature of the diamond sphere from smoldering is independent of its size and the wind speed. If it's a bit hotter, air will suck heat out faster than heat gets produced by smoldering. If it's a bit cooler, smoldering will produce heat faster than the air sucks heat out. At that temperature, the rate the air sucks heat out of the diamond sphere varies as the wind speed to the power of $\frac{1}{2}$ and as the size of the sphere to the power of $\frac{3}{2}$. At that temperature, the rate that the smouldering reaction produces heat also varies as the wind speed to the power of $\frac{1}{2}$ and as the size of the sphere to the power of $\frac{3}{2}$.