Rigorous Hydrodynamics from Linear Boltzmann Equations and Viscosity-Capillarity Balance
Fuente:
arXiv
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913573904580608 |
|---|---|
| author | Kogelbauer, Florian Karlin, Ilya |
| author_facet | Kogelbauer, Florian Karlin, Ilya |
| contents | An exact closure for hydrodynamic variables is rigorously derived from the linear Boltzmann kinetic equation. Our approach, based on spectral theory, structural properties of eigenvectors and the theory of slow manifolds, allows us to define a unique, optimal reduction in phase space close to equilibrium. The hydrodynamically constrained system induces a modification of entropy that ensures pure viscous dissipation on the hydrodynamic manifold, which is interpreted as a non-local variant of Korteweg's theory of viscosity-capillarity balance. The rigorous hydrodynamic equations are exemplified on the Knudsen minimum paradox in a channel flow. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_14174 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Rigorous Hydrodynamics from Linear Boltzmann Equations and Viscosity-Capillarity Balance Kogelbauer, Florian Karlin, Ilya Fluid Dynamics Mathematical Physics An exact closure for hydrodynamic variables is rigorously derived from the linear Boltzmann kinetic equation. Our approach, based on spectral theory, structural properties of eigenvectors and the theory of slow manifolds, allows us to define a unique, optimal reduction in phase space close to equilibrium. The hydrodynamically constrained system induces a modification of entropy that ensures pure viscous dissipation on the hydrodynamic manifold, which is interpreted as a non-local variant of Korteweg's theory of viscosity-capillarity balance. The rigorous hydrodynamic equations are exemplified on the Knudsen minimum paradox in a channel flow. |
| title | Rigorous Hydrodynamics from Linear Boltzmann Equations and Viscosity-Capillarity Balance |
| topic | Fluid Dynamics Mathematical Physics |
| url | https://arxiv.org/abs/2311.14174 |