Simulation Analysis and Experimental Verification of High-Speed Impact of Rocky Asteroids
Fan Huang, Zhiqing Geng, Binqiang Luo, Yuming Peng, Liang Xu, Wei Wang, Biyue Pan, Dongyu Li
TL;DR
This paper studies how high-speed asteroid impacts transfer momentum, using simulations and experiments to improve asteroid defense strategies.
Contribution
The study provides a validated simulation model and experimental data on momentum transfer during asteroid impacts.
Findings
The momentum transfer coefficient increases with impact velocity, from 1.59 at 5 km/s to 1.96 at 11.7 km/s in simulations.
Experimental results showed a momentum transfer coefficient increase from 1.73 at 7 km/s to 2.06 at 11.7 km/s.
Simulation and experimental results showed consistent trends with less than 10% error.
Abstract
Kinetic impact is an effective way to deal with threatening asteroids, and the momentum transfer coefficient during the impact process is an effective indicator for evaluating the impact effect. This article is based on the use of the Smoothed Particle Hydrodynamics (SPH) method to establish a simulation model of high-speed impact of flying discs on granite targets, and obtain parameters such as the shape of the splashing material and the distribution of the target damage during the impact process. An analysis was conducted on the influence of different impact velocities on the kinetic energy transfer coefficient, and it was found that the momentum transfer coefficient increased with the increase in impact velocity, from 1.59 at 5 km/s to 1.96 at 11.7 km/s. A ground high-speed impact system with a speed of over 10 km/s has been established, and the actual momentum transfer coefficient…
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Taxonomy
TopicsFluid Dynamics Simulations and Interactions · High-Velocity Impact and Material Behavior · Fluid Dynamics and Heat Transfer