SIT: Vacuum Wind: Hydrodynamics of Geometric Vacuum Pressure

This preprint presents a hydrodynamic interpretation of vacuum as a geometric medium with intrinsic pressure and relaxation dynamics. Matter locally screens vacuum pressure, generating pressure gradients that produce directed geometric flows referred to as vacuum wind. Gravitational, galactic, and cosmological phenomena are interpreted as emergent consequences of vacuum pressure redistribution rather than as fundamental interactions or modifications of Newtonian dynamics. The framework introduces no new particles, forces, or fundamental constants. It provides a conceptual foundation for describing gravity and cosmic expansion as manifestations of geometric vacuum hydrodynamics. The work is intended as a foundational conceptual contribution to the study of vacuum structure and spacetime geometry.