在NASA火星风洞风成研究中应用颗粒重量相似的局限性

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research Pub Date : 2021-09-01 DOI:10.1016/j.aeolia.2021.100732

J. Marshall , L.K. Fenton , J.J.B. Harlow

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引用次数: 1

摘要

美国宇航局艾姆斯研究中心的火星表面风洞用于模拟火星表面沙尘的风吹运动。由于火星上的物体重量较轻，隧道使用了碎核桃壳形式的较轻的沙子来弥补地球上较高的重力。因此，隧道是根据“粒重相似”原理进行操作的。这种方法可以成功地复制传输阈值，但它会导致颗粒行为的其他方面出现重大差异。

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Limitations of applying grain weight similitude in aeolian studies with NASA Mars Wind Tunnel

The Mars Surface Wind Tunnel at NASA Ames Research Center is used to simulate windblown (aeolian) movement of sand and dust on the martian surface. Because objects weigh less on Mars, the tunnel employs lighter sand in the form of crushed walnut shell to compensate for Earth’s higher gravity. The tunnel is thus operated on the principle of ‘grain-weight similitude’. This approach enables successful replication of transport thresholds but it leads to major discrepancies for other aspects of grain behavior.

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来源期刊

Aeolian Research GEOGRAPHY, PHYSICAL-

CiteScore

7.10

自引率

6.10%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Aeolian Research includes the following topics: • Fundamental Aeolian processes, including sand and dust entrainment, transport and deposition of sediment • Modeling and field studies of Aeolian processes • Instrumentation/measurement in the field and lab • Practical applications including environmental impacts and erosion control • Aeolian landforms, geomorphology and paleoenvironments • Dust-atmosphere/cloud interactions.