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

摘要

This paper deals with a reduced model of the conductive-radiative transient transfer in a participating medium. The accuracy of the analytical solution, 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 simulations involving high forward scattering, linear anisotropic scattering or Rayleigh scattering. This reduced model is then used in the inverse approach in order to determine the intrinsic diffusivity of semitransparent media.