Formation of Tianwen-1 landing crater and mechanical properties of Martian soil near the landing site

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外文摘要：After landing in the Utopia Planitia,Tianwen-1 formed the deepest landing crater on Mars,approximately 40 cm deep,exposing precious information about the mechanical properties of Martian soil.We estab-lished numerical models for the plume-surface interaction(PSI)and the crater formation based on Computational Fluid Dynamics(CFD)methods and the erosion model modified from Roberts'Theory.Comparative studies of cases were conducted with different nozzle heights and soil mechanical proper-ties.The increase in cohesion and internal friction angle leads to a decrease in erosion rate and maximum crater depth,with the cohesion having a greater impact.The influence of the nozzle height is not clear,as it interacts with the position of the Shock Diamond to jointly control the erosion process.Furthermore,we categorized the evolution of landing craters into the dispersive and the concentrated erosion modes based on the morphological characteristics.Finally,we estimated the upper limits of the Martian soil's mechanical properties near Tianwen-1 landing site,with the cohesion ranging from 2612 to 2042 Pa and internal friction angle from 25°to 41°.

外文关键词：

Tianwen-1Plume-surface interactionLanding crater formationMartian soil mechanical propertiesNumerical simulation

作者：

Xinshuo Chen、Zhaobin Zhang、Juan Li、Shouding Li、Tao Xu、Bo Zheng、Xiukuo Sun、Yanfang Wu、Yiming Diao、Xiao Li

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作者单位：

Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China

College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

School of Mathematics,North University of China,Taiyuan 030051,China

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基金：

Key Research Program of the Institute of Geology and Geophysics,CASKey Research Program of the Institute of Geology and Geophysics,CASNational Natural Science Foundation of ChinaCAS Key Technology Talent Program

项目编号：

IGGCAS-202102IGGCAS-20190442230111

出版年：

2024

DOI：

10.1016/j.ijmst.2024.08.010

矿业科学技术学报(英文版)

中国矿业大学

矿业科学技术学报(英文版)

CSTPCDEI

影响因子：1.222

ISSN：2095-2686

年,卷(期)：2024.34(9)