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Proceedings Paper

Modeling the dynamics of thermocapillary motion in a laser fusion--the utilization of the FIDAP pack
Author(s): Maria Walczak; Jerzy Sek
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Paper Abstract

The paper presents the results of analysis of thermocapillary phenomena in the liquid phase of a laser fusion. Making use of the FIDAP program the authors modelled the phenomena of convection using silver as an example. Silver was subjected to the action of a laser radiation pulse of the duration (tau) equals 4 ms and the Gaussian distribution of the power density qo approximately 109 . . . 1011 W/m2, of the radius ro equals 150 micrometer. The axis symmetry of the model was assumed. Thermal coefficients were assumed to be constant for each phase, while the values of the surface tension as a function of temperature. With such assumptions the Marangoni convection is the primary cause of convection motion. The velocity field and the shape of the interfacial surface were determined on the basis of calculations performed using the FIDAP program. The shape coefficient (K equals d/h - width by depth) of the fusion is in good agreement with the real value. The paper indicates some possibilities of using a model built with the help of the FIDAP program for predicting some results of laser melting.

Paper Details

Date Published: 3 October 1997
PDF: 5 pages
Proc. SPIE 3187, Laser Technology V: Applications in Materials Sciences and Engineering, (3 October 1997); doi: 10.1117/12.287820
Show Author Affiliations
Maria Walczak, Technical Univ. of Lodz (Poland)
Jerzy Sek, Technical Univ. of Lodz (Poland)


Published in SPIE Proceedings Vol. 3187:
Laser Technology V: Applications in Materials Sciences and Engineering
Wieslaw L. Wolinski; Jerzy Kusinski, Editor(s)

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