Comment on "Physical significance of artificial numerical noise in direct numerical simulation of turbulence"
Fuente:
arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866918155069161472 |
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| author | McMullen, Ryan M. Gallis, Michael A. Srivastava, Ishan Nonaka, Andrew J. Bell, John B. Garcia, Alejandro L. |
| author_facet | McMullen, Ryan M. Gallis, Michael A. Srivastava, Ishan Nonaka, Andrew J. Bell, John B. Garcia, Alejandro L. |
| contents | Recently, Liao and Qin [J. Fluid Mech. 1008, R2 (2025)] claimed that numerical noise in direct numerical simulation of turbulence using the deterministic Navier-Stokes equations is "approximately equivalent" to the physical noise arising from random molecular motion (thermal fluctuations). We show here that it this claim not supported by their results and that it contradicts other results in the literature. Furthermore, we demonstrate that the numerical implementation of thermal fluctuations in their so-called "clean numerical simulations" is incorrect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_04828 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comment on "Physical significance of artificial numerical noise in direct numerical simulation of turbulence" McMullen, Ryan M. Gallis, Michael A. Srivastava, Ishan Nonaka, Andrew J. Bell, John B. Garcia, Alejandro L. Fluid Dynamics Recently, Liao and Qin [J. Fluid Mech. 1008, R2 (2025)] claimed that numerical noise in direct numerical simulation of turbulence using the deterministic Navier-Stokes equations is "approximately equivalent" to the physical noise arising from random molecular motion (thermal fluctuations). We show here that it this claim not supported by their results and that it contradicts other results in the literature. Furthermore, we demonstrate that the numerical implementation of thermal fluctuations in their so-called "clean numerical simulations" is incorrect. |
| title | Comment on "Physical significance of artificial numerical noise in direct numerical simulation of turbulence" |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2510.04828 |