Marvellous flame wall interaction

Today's Thermodynamics Lecture Ended with a Heroic Question

What would Captain America (or Tux as a Marvel hero) say if a hydrogen flame hit his shield?

My guess:

„This gets way hotter than regular flames.“

„That flame gets dangerously close to the shield.“

„What’s up with that weird surface structure?“

Why is that?

In lean hydrogen flames, thermodiffusive instabilities and resulting local mixture variations can significantly increase local reactivity. That’s why hydrogen flames behave so differently near walls – and why they don’t look or feel like traditional flames.

More scientific background can be found here: https://lnkd.in/e-8ynhiU

Of course, the shield would survive. But maybe we should consider its material for future gas turbine combustors.

Many thanks to Viktoria Huschka for this nice illustration.