This conceptual working paper introduces a novel cosmological framework that reconceptualizes spacetime not as a passive vacuum, but as a dynamic, energetic continuum termed the "spacetime fluid". Addressing the limitations of current cosmological paradigms—such as the elusive nature of dark matter, dark energy, and the unification of fundamental forces—the model posits that this fluid originates from and is sustained by a continuous energy influx from a higher-dimensional manifold. Within this framework, mass is redefined not as an intrinsic entity, but as a stable, localized energy concentration maintained by a volume-dependent absorption of the surrounding fluid's energy. The treatise proposes that this continuous energy absorption creates localized depressions in the fluid's viscosity. Consequently, these mass-induced viscosity gradients induce spacetime curvature, with overlapping fluid flow fields and pressure gradients driving the macroscopic phenomenon of gravitational attraction. Additionally, the model reinterprets inertia as viscous drag within the spacetime fluid and structures the fundamental interactions (Higgs, Electromagnetic, Strong, and Weak nuclear forces) as a hierarchical system of energy conversion modes. By exploring the Cosmic Microwave Background as a potential interdimensional interface and framing dark energy and inflation as emergent fluid properties, this preprint establishes a conceptual foundation intended to guide future mathematical formalization in relativistic fluid dynamics.
Rohit Vasant Khakhrodiya (2026) studied this question.