Grumpy Old Geeks Topics Blue whirl Topic Blue whirl 2 mentions in 1 episode A blue type of fire tornado discussed for its more complete combustion and possible use on oil spills. Mentions 172: No Wood for Vader Aug 12, 2016 1:32:23 They've dubbed the blue whirl since it lacks the distinctive yellow color of traditional flames 1:32:50 they can use this for things like oil spills in the ocean