Experimental, numerical, and analytical velocity spectra in turbulent quantum fluid.
basic_science · Level V
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- Record sourced from PubMed, PMID 24704875.
- Also identified by DOI 10.1073/pnas.1312548111 and PMC identifier 3970856.
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Abstract
Turbulence in superfluid helium is unusual and presents a challenge to fluid dynamicists because it consists of two coupled, interpenetrating turbulent fluids: the first is inviscid with quantized vorticity, and the second is viscous with continuous vorticity. Despite this double nature, the observed spectra of the superfluid turbulent velocity at sufficiently large length scales are similar to those of ordinary turbulence. We present experimental, numerical, and theoretical results that explain these similarities, and illustrate the limits of our present understanding of superfluid turbulence at smaller scales.