Influence of the vorticity-scalar correlation on mixing

被引：0
|
作者：
Yin, Xi-Yuan [1 ]
Agoua, Wesley [1 ]
Wu, Tong [1 ,2 ]
Bos, Wouter J. T. [1 ]
机构：
[1] Univ Claude Bernard Lyon 1, Ecole Cent Lyon, CNRS, INSA Lyon,LMFA,UMR5509, F-69130 Ecully, France
[2] Univ Bayreuth, Theoret Phys 1, D-95447 Bayreuth, Germany
来源：
PHYSICAL REVIEW FLUIDS | 2024年 / 9卷 / 10期
关键词：
STATISTICAL-MECHANICS; DIFFUSION; FIELDS; STATES;
D O I：
10.1103/PhysRevFluids.9.104502
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We investigate the role of the correlation between a scalar quantity and the vorticity in two-dimensional mixing at infinite P & eacute;clet number. We assess, using a diffusivityindependent mixing norm, the dynamics of both Galerkin-truncated ensembles and freely evolving two-dimensional scalar mixing. Both statistical mechanics and numerical experiments show how the mixing rate is attenuated when vorticity and scalar are initially correlated. Since the vorticity is shown to be a poorly mixing scalar, the results suggest that, in general, mixing can be enhanced by minimizing the correlation between vorticity and passive scalar.
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页数：11
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