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Complex Permittivity Study of a Pinus Pinaster Needle Bed on Fire

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

Complex Permittivity Study of a Pinus Pinaster Needle Bed on Fire, Proc ANACOM URSI 15.º Congresso do Comité Português da URSI ''Sustentabilidade ambiental no uso do espectro radioelétrico, Leiria, Portugal, Vol. , pp. - , November, 2021.

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Abstract
In this paper, it is studied a range of complex permittivity values estimated from a Pinus Pinaster fuel bed on fire. The Fire Dynamics Simulator (FDS) was used to model the fire environment and the Cold Plasma Model (CPM) was applied
to evaluate the complex permittivity of such media. Effects of the found maximum and minimum permittivity magnitudes for the considered time step were explored using the Finite-Difference Time-Domain (FDTD) method to comprehend the impact of a weakly ionised plasma generated during vegetation combustion, on radiowave propagation.