The influence of the vorticity-scalar correlation on mixing
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866916138919657472 |
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| author | Yin, Xi-Yuan Agoua, Wesley Wu, Tong Bos, Wouter J. T. |
| author_facet | Yin, Xi-Yuan Agoua, Wesley Wu, Tong Bos, Wouter J. T. |
| contents | We investigate the role of the correlation between a scalar quantity and the vorticity in two-dimensional mixing at infinite Péclet number. We assess, using a diffusivity independent 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16762 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The influence of the vorticity-scalar correlation on mixing Yin, Xi-Yuan Agoua, Wesley Wu, Tong Bos, Wouter J. T. Fluid Dynamics We investigate the role of the correlation between a scalar quantity and the vorticity in two-dimensional mixing at infinite Péclet number. We assess, using a diffusivity independent 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. |
| title | The influence of the vorticity-scalar correlation on mixing |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2402.16762 |