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Analytical Studies of Refractive Index Variation in Pine Needles Media under Wildfire Conditions

Faria, S. ; Vala, M. ; Coimbra, P. ; Felício, J.F. ; Leonor, N. ; Fernandes, C. A. ; Salema, C. ; Caldeirinha, Rafael

Analytical Studies of Refractive Index Variation in Pine Needles Media under Wildfire Conditions, Proc The European Conference on Antennas and Propagation - EuCAP, Düsseldorf, Germany, Vol. , pp. - , March, 2021.

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Abstract
In this paper, a range of refractive indexes found in simulations of fire scenarios, considering the Cold Plasma Model, is explored. The Fire Dynamics Simulator (FDS) was used to model a Pinus Pinaster fuel bed burning in a linear burner. The effects of maximum and minimum refractive index values
were analysed using the Finite-Difference Time-Domain (FDTD) method, aiming to understand how electric characteristics of a plasma may affect the electromagnetic wave propagation. Results clearly indicate the need to further investigate the propagation phenomena under wildfire conditions.