An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning
Functional surfaces characterised by periodic microstructures are sought in numerous technological applications. Direct laser interference patterning (DLIP) is a technique that allows the fabrication of microscopic periodic features on different materials, e.g., metals. The mechanisms effective duri...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Computation |
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| Online Access: | https://www.mdpi.com/2079-3197/8/1/9 |
| _version_ | 1819077620328824832 |
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| author | Cornelius Demuth Andrés Fabián Lasagni |
| author_facet | Cornelius Demuth Andrés Fabián Lasagni |
| author_sort | Cornelius Demuth |
| collection | DOAJ |
| description | Functional surfaces characterised by periodic microstructures are sought in numerous technological applications. Direct laser interference patterning (DLIP) is a technique that allows the fabrication of microscopic periodic features on different materials, e.g., metals. The mechanisms effective during nanosecond pulsed DLIP of metal surfaces are not yet fully understood. In the present investigation, the heat transfer and fluid flow occurring in the metal substrate during the DLIP process are simulated using a smoothed particle hydrodynamics (SPH) methodology. The melt pool convection, driven by surface tension gradients constituting shear stresses according to the Marangoni boundary condition, is solved by an incompressible SPH (ISPH) method. The DLIP simulations reveal a distinct behaviour of the considered substrate materials stainless steel and high-purity aluminium. In particular, the aluminium substrate exhibits a considerably deeper melt pool and remarkable velocity magnitudes of the thermocapillary flow during the patterning process. On the other hand, convection is less pronounced in the processing of stainless steel, whereas the surface temperature is consistently higher. Marangoni convection is therefore a conceivable effective mechanism in the structuring of aluminium at moderate fluences. The different character of the melt pool flow during DLIP of stainless steel and aluminium is confirmed by experimental observations. |
| first_indexed | 2024-12-21T19:00:06Z |
| format | Article |
| id | doaj.art-e811156a5d9846f7a34ff8bed8353640 |
| institution | Directory Open Access Journal |
| issn | 2079-3197 |
| language | English |
| last_indexed | 2024-12-21T19:00:06Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
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| series | Computation |
| spelling | doaj.art-e811156a5d9846f7a34ff8bed83536402022-12-21T18:53:32ZengMDPI AGComputation2079-31972020-01-0181910.3390/computation8010009computation8010009An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference PatterningCornelius Demuth0Andrés Fabián Lasagni1Institute of Manufacturing Technology, Technische Universität Dresden, PO Box, 01062 Dresden, GermanyInstitute of Manufacturing Technology, Technische Universität Dresden, PO Box, 01062 Dresden, GermanyFunctional surfaces characterised by periodic microstructures are sought in numerous technological applications. Direct laser interference patterning (DLIP) is a technique that allows the fabrication of microscopic periodic features on different materials, e.g., metals. The mechanisms effective during nanosecond pulsed DLIP of metal surfaces are not yet fully understood. In the present investigation, the heat transfer and fluid flow occurring in the metal substrate during the DLIP process are simulated using a smoothed particle hydrodynamics (SPH) methodology. The melt pool convection, driven by surface tension gradients constituting shear stresses according to the Marangoni boundary condition, is solved by an incompressible SPH (ISPH) method. The DLIP simulations reveal a distinct behaviour of the considered substrate materials stainless steel and high-purity aluminium. In particular, the aluminium substrate exhibits a considerably deeper melt pool and remarkable velocity magnitudes of the thermocapillary flow during the patterning process. On the other hand, convection is less pronounced in the processing of stainless steel, whereas the surface temperature is consistently higher. Marangoni convection is therefore a conceivable effective mechanism in the structuring of aluminium at moderate fluences. The different character of the melt pool flow during DLIP of stainless steel and aluminium is confirmed by experimental observations.https://www.mdpi.com/2079-3197/8/1/9direct laser interference patterningnanosecond pulsemetalsprocess simulationheat transferfluid flowthermocapillary convectionincompressible smoothed particle hydrodynamics |
| spellingShingle | Cornelius Demuth Andrés Fabián Lasagni An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning Computation direct laser interference patterning nanosecond pulse metals process simulation heat transfer fluid flow thermocapillary convection incompressible smoothed particle hydrodynamics |
| title | An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning |
| title_full | An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning |
| title_fullStr | An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning |
| title_full_unstemmed | An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning |
| title_short | An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning |
| title_sort | incompressible smoothed particle hydrodynamics isph model of direct laser interference patterning |
| topic | direct laser interference patterning nanosecond pulse metals process simulation heat transfer fluid flow thermocapillary convection incompressible smoothed particle hydrodynamics |
| url | https://www.mdpi.com/2079-3197/8/1/9 |
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