Structural uncertainty assessment for fire-engulfed objects in crosswind: Establishing credibility for a multiphysics wall-modeled large-eddy simulation paradigm

Accurately predicting thermal response for fire-engulfed objects subjected to crosswind requires a multiphysics, turbulent reacting flow model suite that leverages large-eddy simulation (LES). Structural uncertainty assessment for isothermal, elevated cylinder configurations showcase excellent predictivity and mesh convergence when using dynamic coefficient LES with nonlocal wall model velocity sampling. This model suite is deployed to a liquid hydrocarbon fire validation study (elevated mock fuselage exposed to low- and high-crosswind) where replication of windward-to-leeward migration of peak heat fluxes and flame attachment characteristics are noted, while revealing novel fire dynamics.