<p class="MsoNormal">Inertial confinement fusion (ICF) facilities, such as the National Ignition Facility (NIF) and Omega, were constructed to develop fusion energy. The conditions needed to produce net energy yield from a deuterium-tritium capsule have yet to be demonstrated at the NIF. Limited experimental facilities and diagnostics require the use of modeling and simulation (M&amp;S) to understand the challenging regimes and complex and coupled physics in ICF experiments. The complexity of the physics requires a multi-tier approach to the verification, validation, and uncertainty quantification (VVUQ) of simulations in support of ICF and high energy density physics (HEDP).</p><p class="MsoNormal">In this talk, we outline a VVUQ strategy undertaken by Los Alamos National Laboratory to provide both quantitative and qualitative confidence in the 3d predictive capabilities of the radiation-hydrodynamics code xRAGE. Due to its potentially significant impact to ICF yield, we focus on jet formation due to instability growth.&nbsp; We discuss a hierarchical strategy spanning single-physics, multi-physics, and system-level simulations and coordination of efforts between verification, validation, and uncertainty quantification. Expected challenges to the VVUQ strategy and application of V&amp;V standards, such as comparing, extracting, and properly fusing information obtained from disparate simulations, correlating verification from analytical solution to applications, solution verification, and the reduction in experimental fidelity with hierarchy level will be addressed by the proposed strategy.</p>

A Hierarchical Strategy for Verification, Validation, and Uncertainty Quantification of Modeling 3d Features in Inertial Confinement Fusion Using Xrage

Paper Proceedings: https://asmedigitalcollection.asme.org/VVS/VVS2021/volume/84782

ASME 2021 Verification and Validation (VVS2021)

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