Three-Dimensional Hydrodynamic Simulations of Turbulence-Driven Deflagration-to-Detonation Transition in Unconfined Reactive Flows

Building on a newly experimentally validated turbulence-driven deflagration-to-detonation transition (tDDT) mechanism, we present three-dimensional hydrodynamic simulations that explore the role of DDT in complex, unconfined reactive flows. Our work specifically applies to thermonuclear Type Ia supernovae (SNe Ia), where the tDDT has been suggested as the mechanism of detonation initiation in the turbulent thermonuclear reacting flows. We will discuss the implications of these simulations, focusing on the interplay between turbulence and combustion leading to detonation. We will offer insights into the fundamental mechanisms governing DDT -- and contributing to enhanced predictive capabilities for energetic astrophysical phenomena.