mathematical theory of compressible viscous fluid
ous fluids is rooted in the Navier-Stokes-Fourier system, which encapsulates conservation laws and thermodynamic principles. Mass Conservation (Continuity Equation) \[ \frac{\partial \rho}{\partial t} + \operatorname{div} (\rho \mathbf{u}) = 0, \] where: \(\rho = \rho(t, \mat