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Radial Heat Conduction in Laser Heating of Material Slabs.
NAVAL RESEARCH LAB WASHINGTON D C
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To quantify the cases in which radial heat conduction is important, this report investigates the heating of metal slabs by laser beams with beams with finite diameters. A two-dimensional approach is taken which assumes cylindrical symmetry, and the method of finite differences is used to determine temperature profiles in the slabs as a function of time and incident flux intensity. The times necessary to induce melting at the front surface of the slabs are obtained in the two-dimensional approach and compared with the times obtained in the one-dimensional approach. This gives a direct indication of the importance of radial heat conduction. Author
APPROVED FOR PUBLIC RELEASE