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Hilbert's sixth problem: derivation of fluid equations via Boltzmann's kinetic theory

2025/03/03 by Yu Deng, Zaher Hani, Deng, Yu +3 · 28 voices · 10 citations
Physics and Astronomy · Mathematics · #Advanced Thermodynamics and Statistical Mechanics #Quantum Mechanics and Applications #Gas Dynamics and Kinetic Theory

paper · pdf · doi:10.48550/arxiv.2503.01800

Abstract

In this paper, we rigorously derive the fundamental PDEs of fluid mechanics, such as the compressible Euler and incompressible Navier-Stokes-Fourier equations, starting from the hard sphere particle systems undergoing elastic collisions. This resolves Hilbert's sixth problem, as it pertains to the program of deriving the fluid equations from Newton's laws by way of Boltzmann's kinetic theory. The proof relies on the derivation of Boltzmann's equation on 2D and 3D tori, which is an extension of our previous work (arXiv:2408.07818).

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