High fluence time-resolved laser-induced incandescence (TiRe-LII) measurements show a discrepancy between experimental observations and model predictions. Several hypotheses have been proposed to explain this discrepancy, including the possibility of back flow of sublimed species and the possibility of formation of shock waves. This is the first study that uses transient Direct Simulation Monte Carlo (DSMC) to investigate the abovementioned effects in high fluence TiRe-LII. This study verifies that back flow of sublimed species occurs, and must be included in analytical models. On the other hand, shock waves were not observed for the fluences and predetermined temperature curves used in this study.

Volume Subject Area:
Computational Heat Transfer
Topics:
Carbon, Fluence (Radiation measurement), Gasdynamics, Lasers, Light emission, Flow (Dynamics), Shock waves, Tires, Simulation, Temperature, Transients (Dynamics)
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