A Review of Simulation Methods of Laser Matter Interactions Focused on Nanosecond Laser Pulsed Systems

Kaselouris, Evaggelos; Nikolos, Ioannis K.; Orphanos, Yannis; Bakarezos, Efthimios; Papadogiannis, N. A.; Tatarakis, M.; Dimitriou, Vanda

doi:10.1142/s1756973713300013

Cited by 11 publications

(3 citation statements)

References 114 publications

(132 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The root γ 1 as well as the real part of the γ 2 and γ 3 are positive and all represent growing perturbations, while the magnitude of the real root γ 1 is larger than the real part of roots γ 2 and γ 3 . To compute the instability instantaneous growth rate, the temperature dependent thermal properties such as c v and κ as well as the temperature dependent mechanical properties such as λ, µ and α T were taken from the literature [4,47,48], while values for ρ, σ xz , σ yz , σ zz , ∂η/∂T, ∂T/∂t and ∂η/∂ρ were taken from our FEM-BEM simulation results and the values for j from the experimental current density, while σ sum is the total stress in z direction i.e. σ sum = σ xz + σ yz + σ zz .…”

Section: Resultsmentioning

confidence: 99%

Progress on the electro-thermo-mechanical instability and its role as seed on plasma instabilities

Kaselouris

Skoulakis

Dimitriou

et al. 2022

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

Ιt was recently demonstrated that a newly explored instability, which was named Electro-Thermo-Mechanical (ETM) instability, was developed in the solid elastic phase in the case of an electrically exploded conductor in the skin effect mode. Here we present new advances in the exploration of the role of the ETM instability as seed of the Magneto-Hydro-Dynamic (MHD) instabilities that are later observed in the plasma phase. Our study, through analytical calculations, simulations and experiments, demonstrates the whole evolution dynamics of the instability amplitude, from the solid to the plasma phase, including the phase transitions. It is validated that the sustained axial wavelength modes in the plasma phase lie in the range of values of those of the ETM instability developed in the solid phase. The results are of significant importance for understanding the role of the ETM instability as seeding for the later observed instabilities in the plasma phase.

show abstract

Section: Resultsmentioning

confidence: 99%

Progress on the electro-thermo-mechanical instability and its role as seed on plasma instabilities

Kaselouris

Skoulakis

Dimitriou

et al. 2022

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…The FEM is a series of computerized numerical calculations based on matrices. It is versatile due to its flexibility in modeling complicated geometries when the domain changes, when the desired precision varies over the entire domain or when the solution lacks smoothness [19,20]. During FEM preprocessing, the structure is subdivided into a mesh (or grid) that, depending on the geometry, may consist of onedimensional line elements; two-dimensional area elements, such as triangles or rectangles; or three-dimensional volume elements, such as regular or irregular tetrahedra or hexahedra or other polyhedra.…”

Section: Methodsmentioning

confidence: 99%

A Review of Finite Element Studies in String Musical Instruments

et al. 2022

View full text Add to dashboard Cite

String instruments are complex mechanical vibrating systems, in terms of both structure and fluid–structure interaction. Here, a review study of the modeling and simulation of stringed musical instruments via the finite element method (FEM) is presented. The paper is focused on the methods capable of simulating (I) the soundboard behavior in bowed, plucked and hammered string musical instruments; (II) the assembled musical instrument box behavior in bowed and plucked instruments; (III) the fluid–structure interaction of assembled musical instruments; and (IV) the interaction of a musical instrument’s resonance box with the surrounding air. Due to the complexity and the high computational demands, a numerical model including all the parts and the full geometry of the instrument resonance box, the fluid–structure interaction and the interaction with the surrounding air has not yet been simulated.

show abstract

“…Lasers are widely used as a valuable tool for laser material processing [1,2] in highprecision cutting and drilling manufacturing operations [3], as well as in laser-assisted machining [4,5]. Laser-solid interaction constitutes a process of major scientific and technological interest, where complex physical phenomena occur.…”

Section: Introductionmentioning

confidence: 99%

Downscaled Finite Element Modeling of Metal Targets for Surface Roughness Level under Pulsed Laser Irradiation

et al. 2021

View full text Add to dashboard Cite

A three-dimensional, thermal-structural finite element model, originally developed for the study of laser–solid interactions and the generation and propagation of surface acoustic waves in the macroscopic level, was downscaled for the investigation of the surface roughness influence on pulsed laser–solid interactions. The dimensions of the computational domain were reduced to include the laser-heated area of interest. The initially flat surface was progressively downscaled to model the spatial roughness profile characteristics with increasing geometrical accuracy. Since we focused on the plastic and melting regimes, where structural changes occur in the submicrometer scale, the proposed downscaling approach allowed for their accurate positioning. Additionally, the multiscale simulation results were discussed in relation to experimental findings based on white light interferometry. The combination of this multiscale modeling approach with the experimental methodology presented in this study provides a multilevel scientific tool for an in-depth analysis of the influence of heat parameters on the surface roughness of solid materials and can be further extended to various laser–solid interaction applications.

show abstract

A Review of Simulation Methods of Laser Matter Interactions Focused on Nanosecond Laser Pulsed Systems

Cited by 11 publications

References 114 publications

Progress on the electro-thermo-mechanical instability and its role as seed on plasma instabilities

Progress on the electro-thermo-mechanical instability and its role as seed on plasma instabilities

A Review of Finite Element Studies in String Musical Instruments

Downscaled Finite Element Modeling of Metal Targets for Surface Roughness Level under Pulsed Laser Irradiation

Contact Info

Product

Resources

About