Recursive Load Distribution in Fluid Dynamics: A Tier-7 Instantiation of the Closed vs Distributed Recursion Law

This technical note presents a Tier-7 domain instantiation of the recursion-under-load principle formalised at Tier-6 within the Paton System. It demonstrates that continuum fluid mechanics exhibits the same structural distinction identified in the abstract framework: closed recursion under sustained nonlinear amplification can drive boundary collision (instability), while distributed dissipation preserves bounded continuation through energy moderation. Using the incompressible Navier–Stokes equation as reference, nonlinear advection is interpreted as load amplification and viscous dissipation as distributed stabilisation. The mapping introduces no new operators and makes no new physical claims. The foundational admissibility spine (Gate → Datum → ℘) remains unchanged. The document functions as a Tier-7 structural reinforcement layer, showing domain invariance of the Tier-6 recursion-under-load law within standard fluid dynamics.