The Navier-Stokes Equation First formulated in the 19th century by Claude-Louis Navier and George Gabriel Stokes, the Navier-Stokes equations describe the motion of fluid substances.

References [1] Derivation of Navier–Stokes equation in rotational frame for engineering flow analysis. International Journal of Thermofluids (2021). [2] Extensions to the Navier–Stokes equations.

In principle, each theory should build on the theory below it in the hierarchy: the Euler and Navier-Stokes equations at the macroscopic level should follow logically from the Boltzmann equation ...