Non-classical Velocity Statistics in Counterflow Quantum Turbulence

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• 作者：Luca Galantucci (1)
  Michele Sciacca (2)
  
• 关键词：Quantum turbulence ; Superfluid helium ; Non ; Gaussian velocity statistics ; Thermal counterflow
• 刊名：Acta Applicandae Mathematicae
• 出版年：2014
• 出版时间：August 2014
• 年：2014
• 卷：132
• 期：1
• 页码：273-281
• 全文大小：661 KB
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• 作者单位：Luca Galantucci (1)
  Michele Sciacca (2)
  
  1. Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
  2. Department Scienze Agrarie e Forestali, Universit谩 degli Studi di Palermo, Palermo, Italy
  
• ISSN：1572-9036

文摘

In this work we analyse the statistical distribution of turbulent superfluid velocity components in a He II counterflow channel, via two-dimensional numerical simulations presented in past studies. The Probability Density Functions (PDFs) of the superfluid velocity components are investigated at lengthscales smaller than the average intervortex spacing, for varying vortex densities and different wall-normal distances. The results obtained confirm the non-classical signature of quantum turbulence already observed in past numerical studies.