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<p>Aboard the variable-gravity research rack (VGR) of the Chinese Space Station, scientists can conduct experiments under reduced gravities in a centrifuge. This study analyzes the spatial distribution effects of centrifugal gravitational fields and Coriolis force effects in the granular collapse experiments conducted in the centrifuge. Under the ground-based 1&#xa0;g and space equivalent 1&#xa0;g conditions, we have investigated the influences of centrifugal equivalent gravitational fields on the granular collapsed deposition shape. The granular column collapse has formed a complex deposition shape with the middle section slope angle close to the angle of repulse of the granular material. Both the horizontal centrifuge acceleration component and the Coriolis force in the space centrifuge has significantly changed the deposition height and upper-section slope angles compared to the benchmark experiment conducted on the ground. Numerical simulations were further performed for equivalent gravity levels of 1/6&#xa0;g and 1/3&#xa0;g, revealing that under the prediction of the rate-independent constitutive model used, the final collapse morphologies are independent of gravity levels, and the influence of the centrifuge gravity field is also unrelated to the gravity level magnitude.</p>

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Assessment of the Equivalent Low-Gravity of the Granular Collapse Equipment in the VGR of the Chinese Space Station

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Sen Yang,
  • Xiaohui Cheng,
  • Meiying Hou,
  • Lichao Yu

摘要

Aboard the variable-gravity research rack (VGR) of the Chinese Space Station, scientists can conduct experiments under reduced gravities in a centrifuge. This study analyzes the spatial distribution effects of centrifugal gravitational fields and Coriolis force effects in the granular collapse experiments conducted in the centrifuge. Under the ground-based 1 g and space equivalent 1 g conditions, we have investigated the influences of centrifugal equivalent gravitational fields on the granular collapsed deposition shape. The granular column collapse has formed a complex deposition shape with the middle section slope angle close to the angle of repulse of the granular material. Both the horizontal centrifuge acceleration component and the Coriolis force in the space centrifuge has significantly changed the deposition height and upper-section slope angles compared to the benchmark experiment conducted on the ground. Numerical simulations were further performed for equivalent gravity levels of 1/6 g and 1/3 g, revealing that under the prediction of the rate-independent constitutive model used, the final collapse morphologies are independent of gravity levels, and the influence of the centrifuge gravity field is also unrelated to the gravity level magnitude.