Fox Tail

The Defense Advanced Research Projects Agency (DARPA) is seeking innovative research proposals to advance extreme‑scale hydrodynamics, including high‑amplitude wave propagation, very high Reynolds‑number flows, and abrupt phase changes. The effort will develop first‑principles‑based theoretical and computational models that provide thermodynamically consistent closures for these phenomena, with deliverables and milestones detailed in a classified addendum. Funding will be provided via a prototype Other Transaction Agreement (OTA) over an 18‑month period (12‑month base period plus a 6‑month option). Successful proposals must meet SECRET‑level security clearance requirements and maintain at least CMMC Level 2 compliance for all prime and subcontractor personnel. • Technical focus: extreme‑scale fluid dynamics modeling, high‑fidelity simulation, and thermodynamic non‑equilibrium closures. • Contract type: Fixed‑price OTA prototype with multiple milestones; total performance period 18 months. • Eligibility: U.S. entities with SECRET clearance and CMMC Level 2; small businesses, HBCUs, and other non‑traditional contractors are encouraged. • Submission timeline: Abstract due Nov 13 2026; full proposal due Jan 29 2027 (4 p.m. ET).