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A 2D numerical modeling is developed to simulate the cutting process of metals using a high power laser beam. The range of temperatures occurring in such process vary between the ambient and could be beyond the vaporization ones. When the evaporation regime is reached, the evaporated material can be simulated by considering a mass transfer between...
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This paper deals with spread and evaporation of a cryogenic liquid on land. The evaporation velocity, the vaporized volume of the liquid per unit area and unit time, is measured for the first time as a function of a release flow rate and time for liquid nitrogen that is spreading radially. The evaporation velocity is one of the main parameters that...
Citations
Laser material processing is a technology with an increasing number of industrial applications, especially for aviation and automotive. The present keynote paper focusses on the advances in macro-scale laser processing, meaning that the laser generated structures are large enough to be visible with the naked eye. Next to that, also the reasons for the advances, especially the improvements regarding the power and the beam quality of the laser sources, the higher capabilities of the systems technologies and an increasing process understanding are shown. Nevertheless, challenges like a holistic understanding of the physical phenomena and the evolution of defects in some processing methods remain to be solved in future.
A theoretical approach based on experimental operating data, with the aim to simulate the molten material movements under the effect of the laser beam and the gas jet, under normal atmospheric conditions is developed. A 2D numerical modeling allows to investigate the surface tension effect on the metallic film behavior. We deal with a multiphase problem, where the air-liquid metal interface is submitted to the gas jet effect. The interface is tracked by implementation of the Volume Of Fluid method through Fluent CFD code. A gaussian beam shape profile is studied in our simulations.
