FAR EASTERN BRANCH OF THE RUSSIAN ACADEMY OF SCIENCES
INSTITUTE OF APPLIED MATHEMATICS KHABAROVSK DIVISION
Far Eastern Mathematical Journal
The role of surface tension and wetting in the cultivation of metal products in direct laser 3D printing technologies |
Belozerov N. I., Chekhonin K. A. |
2024, issue 2, P. 157-169 DOI: https://doi.org/10.47910/FEMJ202414 |
Abstract |
| The three-dimensional convective heat and mass transfer occurring in a metal melt bath during layer build-up in 3D laser printing technologies (L-DED technology) is considered. The mathematical model of the considered non-isothermal hydrodynamic process with a phase transition is based on the Navier-Stokes, continuity and energy equations, taking into account diffusion, convective and radiative heat losses. The dynamic model of the free surface of the metal melt includes a Laplace pressure jump, Marangoni forces and wetting conditions. The numerical solution of the problem is performed by the method of mixed finite elements with a divergently stable approximation of the main variables. The influence of surface tension and wetting dynamics on the evolution of geometric parameters of a melt bath during thin wall growth is shown. |
Keywords: L-DED technologies, surface tension, wetting, convective heat and mass transfer, phase transition, free surface. |
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References |
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