To improve LII as a quantitative tool for extraction of soot properties, the models describing the heat and mass transfer between the particles and the surrounding gas must be tested against well-characterized experiments. In this work we have made a detailed investigation in which experimental results have been compared with simulated ones in two different configurations; backward-LII and 90º-LII. Although the results show a qualitatively good agreement, it is realized that an improved physical description is needed for the LII signal behavior.

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