On the hydrostatic approximation of compressible anisotropic Navier-Stokes equations - rigorous justification

0559485 - MÚ 2023 RIV CH eng J - Journal Article
Gao, H. - Nečasová, Šárka - Tang, T.
On the hydrostatic approximation of compressible anisotropic Navier-Stokes equations - rigorous justification.
Journal of Mathematical Fluid Mechanics. Roč. 24, č. 3 (2022), č. článku 86. ISSN 1422-6928. E-ISSN 1422-6952
R&D Projects: GA ČR(CZ) GA19-04243S; GA ČR(CZ) GA22-01591S
Grant - others:AV ČR(CZ) AP2101
Program: Akademická prémie - Praemium Academiae
Institutional support: RVO:67985840
Keywords : anisotropic Naiver-Stokes equations * aspect ratio limit * compressible Primitive Equations * hydrostatic approximation
OECD category: Pure mathematics
Impact factor: 1.3, year: 2022
Method of publishing: Limited access
https://doi.org/10.1007/s00021-022-00717-z

In this work, we derive the hydrostatic approximation by taking the small aspect ratio limit to the Navier–Stokes equations. The aspect ratio (the ratio of the depth to horizontal width) is a geometrical constraint in the general large scale geophysical motions meaning that the vertical scale is significantly smaller than horizontal. We derive the versatile relative entropy inequality. Applying the versatile relative entropy inequality we gave the rigorous derivation of the limit from the compressible Navier–Stokes equations to the compressible Primitive Equations. This is the first work where the relative entropy inequality was used for proving hydrostatic approximation - the compressible Primitive Equations.
Permanent Link: https://hdl.handle.net/11104/0332765