Simulation Method of Microscale Fluid-Structure Interactions: Diffuse-Resistance-Domain Approach
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| Format: | Preprint |
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2024
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| _version_ | 1866912523962286080 |
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| author | Gao, Min Li, Zhihao Xu, Xinpeng |
| author_facet | Gao, Min Li, Zhihao Xu, Xinpeng |
| contents | Direct numerical simulations (DNS) of microscale fluid-structure interactions (mFSI) in multicomponent multiphase flows pose many challenges, including the thermodynamic consistency of multiphysics couplings, tracking of moving interfaces, dynamics of moving triple-phase contact lines, and the coupling of multiphase hydrodynamics with phase transition dynamics. We propose and validate a generic DNS approach: Diffuse-Resistance-Domain (DRD) approach. It overcomes the above challenges by employing Onsager's variational principle (OVP) to formulate dynamic models and combining traditional diffuse-interface models for fluid-fluid interfacial dynamics with a novel implementation of complex fluid-solid interfacial conditions via smooth interpolations of dynamic-resistance coefficients across interfaces. After careful validation by numerous benchmark simulations, we simulated several cutting-edge, challenging mFSI problems across diverse fields. This generic DNS approach offers a promising tool for elucidating physical mechanisms, manipulating microscale fluid dynamics, and optimizing engineering processes across diverse fields. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_14291 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Simulation Method of Microscale Fluid-Structure Interactions: Diffuse-Resistance-Domain Approach Gao, Min Li, Zhihao Xu, Xinpeng Fluid Dynamics 74F10, 76-10, 76S05 J.2; G.1.2; I.6.4; I.6.5 Direct numerical simulations (DNS) of microscale fluid-structure interactions (mFSI) in multicomponent multiphase flows pose many challenges, including the thermodynamic consistency of multiphysics couplings, tracking of moving interfaces, dynamics of moving triple-phase contact lines, and the coupling of multiphase hydrodynamics with phase transition dynamics. We propose and validate a generic DNS approach: Diffuse-Resistance-Domain (DRD) approach. It overcomes the above challenges by employing Onsager's variational principle (OVP) to formulate dynamic models and combining traditional diffuse-interface models for fluid-fluid interfacial dynamics with a novel implementation of complex fluid-solid interfacial conditions via smooth interpolations of dynamic-resistance coefficients across interfaces. After careful validation by numerous benchmark simulations, we simulated several cutting-edge, challenging mFSI problems across diverse fields. This generic DNS approach offers a promising tool for elucidating physical mechanisms, manipulating microscale fluid dynamics, and optimizing engineering processes across diverse fields. |
| title | Simulation Method of Microscale Fluid-Structure Interactions: Diffuse-Resistance-Domain Approach |
| topic | Fluid Dynamics 74F10, 76-10, 76S05 J.2; G.1.2; I.6.4; I.6.5 |
| url | https://arxiv.org/abs/2407.14291 |