Simulation of melt film dynamics in laser fusion cutting using a boundary layer approximation

Halm, Ulrich; Nießen, Markus; Schulz, Wolfgang

doi:10.1016/j.ijheatmasstransfer.2020.120837

Cited by 9 publications

(6 citation statements)

References 19 publications

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“…Indeed, Fig. 2 (right) reveals growing stability measure for larger cutting velocites and hence, we may expect the cutting front to be smoother which coincides with experimental [4] and numerical [3] observations of ripple depths (technically denoted as R z5 value).…”

Section: Illustration With Real-world Datasupporting

confidence: 80%

“…In other words, the heat flow characteristics dominantly determine the stability properties. [4] as well as numerically simulated [3] ripple depths in (P1)-(P4)…”

Section: Illustration With Real-world Datamentioning

confidence: 95%

“…We consider the parameter study (P1)-(P4) of fibre laser cutting with different cutting velocities v ′ 0 given by 0.0167 m s , 0.033 m s , 0.05 m s 0.1 m s , respectively, applied experimentally in [4] and numerically in [3]. The fixed material and process parameters are given in Figure 2 (left).…”

Section: Illustration With Real-world Datamentioning

confidence: 99%

“…Laser cutting can be regarded as a free boundary multiphase problem for the material, the melt and the cutting gas. Modelling can be found in [2,6,9,10,15] whereas numerical simulation has been applied by, e.g., [3,7,8]. Experimental investigations on cutting quality can be found, e.g., in [11].…”

Section: Introductionmentioning

confidence: 99%

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Higher Order Asymptotic Expansion Effects in Laser Cutting Modelling

Vossen

Itner

2023

Proc Appl Math and Mech

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A new model for laser cutting is derived by asymptotic expansion techniques. The model describes the movements of the free boundaries of the melt flow and involves higher order expansion terms arising from impulse and energy balance as well as surface tension phenomena. Its stationary solution is derived and analyzed for stability. The stability is correlated to published numerical and experimental results for the cutting quality.

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Section: Illustration With Real-world Datasupporting

confidence: 80%

“…In other words, the heat flow characteristics dominantly determine the stability properties. [4] as well as numerically simulated [3] ripple depths in (P1)-(P4)…”

Section: Illustration With Real-world Datamentioning

confidence: 95%

Section: Illustration With Real-world Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Higher Order Asymptotic Expansion Effects in Laser Cutting Modelling

Vossen

Itner

2023

Proc Appl Math and Mech

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“…Fusion cutting requires a laser power that it is able to cut and process on the surface of the workpiece to form a key chain. In contrast to vaporization cutting, the melt under fusion cutting conditions needs to be effectively purged with assist gas instead of being removed by the gasification process [72][73][74]. Fusion cutting avoids the problem of emission and absorption of laser beam by steam.…”

Section: Fusion Cuttingmentioning

confidence: 99%

Laser Cutting Technologies and Corresponding Pollution Control Strategy

Xie

et al. 2022

Processes

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In conjunction with the increasing demand for material cutting, such as the decommissioning and dismantling of nuclear facilities, advanced cutting technologies need be developed to increase precision and cost-effectiveness. As compared with other cutting technologies, laser cutting offers advantages of greater cutting precision, accuracy, and customization. In this work, we investigated the constitution, classification, and current status of this technology. Pollutant emission during laser cutting, corresponding pollution control methods and apparatus were proposed as well. Laser cutting equipment mainly comprises an automated system integrating a fiber laser, industrial computer, servo motor control, electrical control, and detection technology. It mainly consists of mechanical and electrical control parts. Laser cutting equipment is distinguished by light source, power, and cutting dimensions. Known variants of laser cutting technology involve vaporization, fusion, reactive fusion, and controlled fracture cutting. During the cutting process, dust, smoke, and aerosols can be released, which is an environmental concern and poses a threat to public health. The selection of the dedusting method and design of apparatus should take into account the dust removal rate, initial capital cost, maintenance cost, etc. Multi-stage filtration such as bag filtration combined with activated carbon filtration or electrostatic filtration is accepted.

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