Flash experiment on a semitransparent material: Interest of a reduced model

This paper deals with a reduced model of the conductive-radiative transient transfer in a participating medium. The accuracy of the analytical solutio n, based on the well-known two-flux approximation and expressed with global radiative coefficients, is tested in the case of sharp thermal excitation by a heat pulse on the front face of anisotropically scattering media. Very good agreement is achieved compared with numerical and analytical simulati ons involving high forward scattering, linear anisotropic scattering or Ray leigh scattering. This reduced model is then used in the inverse approach i n order to determine the intrinsic diffusivity of semitransparent media.