Changes in Version 2: This major revision fundamentally updates the statistical confrontation of the Electron Flow Model (EFM). Version 2 transitions from a constrained baryonic anchor to a fully unconstrained Bayesian Markov Chain Monte Carlo (MCMC) integration, Executing 25,000 Steps over a filtered 1,371-supernova dataset (z > 0.023). Allowing the fluid parameters to converge naturally yields H0 = 73.05 km/s/Mpc, Ωm = 0.325, and a vacuum impedance (τvac = 0.154) that is statistically consistent with zero. Crucially, this rigorous re-evaluation reveals a strict observational degeneracy at late-universe redshifts, confirming that supernova data alone cannot distinguish between the EFM's fluid thermodynamics and the legacy geometric expansion of ΛCDM without incorporating early-universe Cosmic Microwave Background (CMB) metrics. This manuscript presents a rigorous empirical validation of the Electron Flow Model (EFM) against the Pantheon+ Type Ia Supernova Catalog. By directly confronting the EFM’s Viscous Propagation Integral with the filtered set of 1,371 distance moduli, we demonstrate that the model natively reproduces observed luminosity-distance curves. Using formal Bayesian Markov Chain Monte Carlo (MCMC) methods across a 25,000-step convergence, this empirical confrontation establishes the robust predictive capabilities of the EFM, demonstrating that astrophysical phenomena can be natively reproduced without dependence on unverified theoretical placeholders. By allowing the fluid parameters to converge naturally via an unconstrained MCMC integration, the model aligns with observations without requiring a cosmological constant or dark energy. The best-fit parameters are H0 = 73.05 km/s/Mpc, Ωm = 0.325, and τvac = 0.154. The analysis confirms that standard supernova catalogs cannot isolate the purely baryonic matter fraction without external high-redshift constraints, presenting a candid fluid-dynamic baseline for future CMB validation. The Unified Fluid Cosmos Framework: This paper serves as Manuscript 16 Version 2 in the comprehensive series, Marabūt's Theory of Gravity. It presents the Electron Flow Model (EFM), a generative, fluid-dynamic framework designed to fundamentally replace Albert Einstein's General Relativity and standard Quantum Mechanics. The EFM shatters classical circularity with a single, undeniable foundational premise: Gravity is Pressure, not curvature, and not an intrinsic mass property. Published Manuscripts in this Series: Manuscript 01: The Push-Pull Mechanics of Vacuum Flux (The Foundational Framework) — https://doi.org/10.5281/zenodo.18874694 Manuscript 02: Resolving the Weyl Potential Anomaly — https://doi.org/10.5281/zenodo.19784494 Manuscript 03: Mechanistic Resolution of Jet Deflection in Cygnus X-1 — https://doi.org/10.5281/zenodo.19790983 Manuscript 04: Quantum Mechanics of Stellar Chain Reactions and EVGS Formation — https://doi.org/10.5281/zenodo.19801398 Manuscript 05: The Heliospheric Grand Data Matrix — https://doi.org/10.5281/zenodo.20128776 Manuscript 06: Fluid-Dynamic Reinterpretation of Gravity, Black Holes, and Gravitational Waves — https://doi.org/10.5281/zenodo.20129518 Manuscript 07: Fluid-Dynamic Reinterpretation of the Kinematic Sunyaev-Zeldovich Effect — https://doi.org/10.5281/zenodo.20130259 Manuscript 08: Transcending the Singularity — Electron Void Gravitational Spheres — https://doi.org/10.5281/zenodo.20130801 Manuscript 09: The Final Parsec Problem Solved — https://doi.org/10.5281/zenodo.20134048 Manuscript 10: The Illusion of the Singularity — https://doi.org/10.5281/zenodo.20135533 Manuscript 11: The Illusion of Dark Energy — https://doi.org/10.5281/zenodo.20149141 Manuscript 12: The Illusion of Dark Matter — https://doi.org/10.5281/zenodo.20171372 Manuscript 13: The Illusion of Spacetime — https://doi.org/10.5281/zenodo.20172281 Manuscript 14: The Illusion of Spooky Action — https://doi.org/10.5281/zenodo.20173191 Manuscript 15: The Superluminal Mechanics of the Quantum Vacuum — https://doi.org/10.5281/zenodo.20173755 Manuscript 16: Empirical Validation of the Electron Flow Model — https://doi.org/10.5281/zenodo.20271062 Manuscript 17: Confronting the Cosmic Microwave Background — https://doi.org/10.5281/zenodo.20483713 Manuscript 18: Resolving the CMB Power Spectrum — https://doi.org/10.5281/zenodo.20493520 Manuscript 19: The Foundation of Stellar Dynamics — https://doi.org/10.5281/zenodo.20500168 Manuscript 20: Resolving the Black Hole Information Paradox — https://doi.org/10.5281/zenodo.20535631 Manuscript 21: Hydrodynamic Shockwaves and Wave-Particle Duality (Current Paper) — https://doi.org/10.5281/zenodo.20620456 Data & Code Availability: To accompany this manuscript, we have open-sourced the complete Python mathematical engine and a fully interactive 3D web-based simulation of the EFM Volumetric Profiler. Researchers, developers, and students can visually explore the hydrodynamic vacuum flux across the celestial bodies at: Interactive 3D EFM Volumetric Profiler: https://marabutmarabut.github.io/Theory-of-Gravity Official GitHub Repository: https://github.com/MarabutMarabut/Theory-of-Gravity
Marabūt et al. (Thu,) studied this question.