Holographic Turbulence

physics4me

Turbulent black holes grow fractal skins as they feed

Left: The boundary vorticity ω at 3 times. Right: the horizon area element γ at the same 3 times. Left: The boundary vorticity ω at 3 times. Right: the horizon area element sqrt(γ) at the same 3 times.

by Lisa Grossman – newscientist

Feeding black holes develop a fractal skin as they grow. That’s the conclusion of simulations that take advantage of a correlation between fluid dynamics and gravity.

“We showed that when you throw stuff into a black hole, the surface of the black hole responds like a fluid – and in particular, it can become turbulent,” says Allan Adams at the Massachusetts Institute of Technology. “More precisely, the horizon itself becomes a fractal.”

Fractals are mathematical sets that show self-similar patterns: zoom in on one part of a fractal drawing, like the famous Mandelbrot set, and the smaller portion will look nearly the same as the original image. Objects with fractal geometries show up all over nature, from…

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