Regularized Fluctuating Lattice Boltzmann Model
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909900111609856 |
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| author | Lauricella, Marco Montessori, Andrea Tiribocchi, Adriano Succi, Sauro |
| author_facet | Lauricella, Marco Montessori, Andrea Tiribocchi, Adriano Succi, Sauro |
| contents | We introduce a regularized fluctuating lattice Boltzmann model (Reg-FLBM) for the D3Q27 lattice, which incorporates thermal fluctuations through Hermite-based projections to ensure compliance with the fluctuation-dissipation theorem. By leveraging the recursive regularization framework, the model achieves thermodynamic consistency for both hydrodynamic and ghost modes. Compared to the conventional single-relaxation-time BGK-FLBM, the Reg-FLBM provides improved stability and a more accurate description of thermal fluctuations. The implementation is optimized for large-scale parallel simulations on GPU-accelerated architectures, enabling systematic investigation of fluctuation-driven phenomena in mesoscale and nanoscale fluid systems. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_08820 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Regularized Fluctuating Lattice Boltzmann Model Lauricella, Marco Montessori, Andrea Tiribocchi, Adriano Succi, Sauro Computational Physics Statistical Mechanics We introduce a regularized fluctuating lattice Boltzmann model (Reg-FLBM) for the D3Q27 lattice, which incorporates thermal fluctuations through Hermite-based projections to ensure compliance with the fluctuation-dissipation theorem. By leveraging the recursive regularization framework, the model achieves thermodynamic consistency for both hydrodynamic and ghost modes. Compared to the conventional single-relaxation-time BGK-FLBM, the Reg-FLBM provides improved stability and a more accurate description of thermal fluctuations. The implementation is optimized for large-scale parallel simulations on GPU-accelerated architectures, enabling systematic investigation of fluctuation-driven phenomena in mesoscale and nanoscale fluid systems. |
| title | Regularized Fluctuating Lattice Boltzmann Model |
| topic | Computational Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2507.08820 |