[PPS04-P03] A Tentative Numerical Study on the Effect of Aspect Ratio of Cylindrical Projectile on Crater Morphology using iSALE code
Keywords:Asteroid, iSALE, Impact
In this work, I use the iSALE shock physics code (Amsden et al., 1980; Collins et al., 2004; Wünnemann et al., 2006). A cylinder with an aspect ratio (height/width) and a uniform sand layer was used as the projectile and the target. The impact velocity was set to 2 km/s. The Tillotson EOS for iron and quartz were used. The aspect ratio was varied from 0.36 (disk) to 8.0 (rod), while the volume was almost constant. A gravity of 9.8 m/s2 was included in the calculation. After the calculations, the depth and diameter of the crater were measured.
With the increase of the aspect ratio of the projectile, the depth of the crater increased, while its diameter was almost unchanged. In this poster, the detailed analysis of the crater morphologies will be described.
Acknowledgments: I appreciate the developers of iSALE, including G. Collins, K. W ünnemann, B. Ivanov, J. Melosh, and D. Elbeshausen. Numerical computations were carried out on PC cluster at Center for Computational Astrophysics (CfCA), National Astronomical Observatory of Japan. I am grateful for the iSALE users group in Japan, including K. Kurosawa, Y. Kanada, R. Suetsugu, and S. Wakita, and the LOC of iSALE workshop 2019 at CfCA.