A theoretical model of temperature dynamics
of the solid surface of a material under action of laser radiation
L.V. Shmeleva and A.D. Suprun

Taras Shevchenko Kyiv National University, Faculty of Physics
2a, Academician Glushkov Ave., 03022 Kyiv, Ukraine; e-mail: lshmel@univ.kiev.ua

Abstract. We have developed a theoretical model that describes the interaction of
intense pulsed flows of energy with matter and is based on the account of local phase
transitions at the destruction of a surface. In the frame of a problem concerning the
influence of a laser radiation on the surface prior to the beginning of the solid surface
destruction, we have solved the equation for the energy flow. The general solution of the
equation for the temperature change of a local area of the irradiated solid surface in time
is obtained with regard for the coefficient of surface dissipative losses and the volume
absorption coefficient. It is shown that the temperature dynamics stimulated by the
intense laser radiation depends substantially on properties of the surface layer of the
irradiated material.

Keywords: intensity of radiation, dissipative losses, volumetric absorption,
hydrodynamic model of continuum, temperature dynamics, local changes..