Material Response Modelling of Ablating Thin Layers

The state-of-the-art volume-averaging thin-layer approach is a highly advanced method capable of accurately predicting the material response when different materials are present. Extensive validation in previous studies has confirmed its reliability and accuracy. In the current analysis, complex geometries such as is o-q and flat-face cylinders have been specifically selected to examine the behavior of the thin layer. The thin layer material chosen for this investigation is room-temperature vulcanized rubber (RTV), which undergoes a phase change during the simulation. Initially, the RTV is impermeable, effectively blocking the passage of pyrolysis gases and heat. However, as the RTV transforms into char, it undergoes a change in its permeability, allowing the flow to pass through it. This dynamic behavior of the RTV, including the permeability transition, is effectively captured in the analyses, enhancing the overall understanding of the system.