Fractal characteristics of surface roughness and their effects on laser shock waves

The Weierstrass–Mandelbrot function model was used to simulate the rough topography of a target surface, and the fractal theory was used to study the fractal characteristics of the target surface topography, which is the self-similarity of surface topography. The 3D fluid dynamics governing equation...

Full description

Saved in:
Bibliographic Details
Published in:AIP advances 2022-12, Vol.12 (12), p.125021-125021-11
Main Authors: Zhu, Qingyong, Zheng, Jinkun, Sun, Junjun
Format: Article
Language:English
Subjects:
Ablation
Cartesian coordinates
Detonation waves
Equations of state
Fluid dynamics
Fractals
Laser shock processing
Mathematical models
Plasma pressure
Propagation velocity
Self-similarity
Shock waves
Simulation
Surface roughness
Topography
Wave propagation
Waveforms
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Weierstrass–Mandelbrot function model was used to simulate the rough topography of a target surface, and the fractal theory was used to study the fractal characteristics of the target surface topography, which is the self-similarity of surface topography. The 3D fluid dynamics governing equations of the laser-supported detonation plasma flow field in Cartesian coordinates are given and discretized by a high-order difference scheme. The equation of state of plasma under different conditions is considered, and a new method of flux splitting is introduced to carry out numerical simulations. The numerical results of plasma pressure, density, temperature, and velocity at different times and different surface roughnesses are obtained, which show the evolvement of the ablative plasma. The simulated results show that a rough surface can obviously affect the propagation velocity of the detonation wave near the wall. In addition, the waveform is also destroyed, forming a broken waveform.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0133174