Abstract: In the traditional heat transfer computation,laser heating is always treated as one kind of special boundary conditions,that is, the second boundary condition,which is not fit for the real condition of laser absorption,especially for the thin layer porous material.Differently from the traditional methods,the laser heating is regarded as an inner thermal source and it is assumed that the intensity of the laser attenuates exponentially with its penetration depth.Since evident non Fourier heat conduction effects may appear in thin layer porous materials heated by the high intensity laser pulse,the hyperbolic non Fourier heat conduction model is used to describe this heat transfer case and the corresponding numerical solution is obtained with the finite difference method.According to the obtained solution,some correlations of the non Fourier effect and the optical property of the heated materials are obtained too.

Key words: non-Fourier heat conduction, porous material, laser heat treatment, numerical simulation