Effect of gravity on generalized thermoelastic diffusion due to laser pulse using dual-phase-lag model.

Purpose The purpose of this paper is to obtain a general solution to the field equations of generalized thermo-diffusion in an infinite thermoelastic body under the effect of gravity in the context of the dual-phase-lag (DPL) model. The half space is considered made of an isotropic homogeneous thermoelastic material. The boundary plane surface is heated by a non-Gaussian laser beam.Design/methodology/approach An exact solution to the problem is obtained using the normal mode analysis.Findings The derived expressions are computed numerically for copper and the results are presented in graphical form.Originality/value Comparisons are made with the results predicted by Lord-Shulman theory and DPL model for different values of time and in the presence and absence of gravity as well as diffusion. [ABSTRACT FROM AUTHOR]