The motion of a rigid body in a viscous fluid: new results for strong solutions, uniqueness and integrability properties
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| Format: | Preprint |
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2025
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| _version_ | 1866911093537898496 |
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| author | Maremonti, Paolo Palma, Filippo |
| author_facet | Maremonti, Paolo Palma, Filippo |
| contents | In this note, we show two results in the setting of Galdi-Silvestre strong solutions for the rigid body-viscous fluid interaction. The former, under an additional integrability assumption on the gradient of the initial data, proves that the time derivative of the solution belongs to $L^2(0,T;L^2(Ω))$. The latter, thanks to a further assumption only on one solution, proves that the uniqueness holds in the quoted setting. However, our extra assumption for the uniqueness is certainly verified under the integrability assumption on the gradient of the initial data. Hence, the set of solutions enjoying the uniqueness is not empty. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_11105 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The motion of a rigid body in a viscous fluid: new results for strong solutions, uniqueness and integrability properties Maremonti, Paolo Palma, Filippo Analysis of PDEs Mathematical Physics 35Q30, 76D03 In this note, we show two results in the setting of Galdi-Silvestre strong solutions for the rigid body-viscous fluid interaction. The former, under an additional integrability assumption on the gradient of the initial data, proves that the time derivative of the solution belongs to $L^2(0,T;L^2(Ω))$. The latter, thanks to a further assumption only on one solution, proves that the uniqueness holds in the quoted setting. However, our extra assumption for the uniqueness is certainly verified under the integrability assumption on the gradient of the initial data. Hence, the set of solutions enjoying the uniqueness is not empty. |
| title | The motion of a rigid body in a viscous fluid: new results for strong solutions, uniqueness and integrability properties |
| topic | Analysis of PDEs Mathematical Physics 35Q30, 76D03 |
| url | https://arxiv.org/abs/2507.11105 |