Gas flow within Martian soil: experiments on granular Knudsen compressors
Gas flow within Martian soil: experiments on granular Knudsen compressors
复制标题
火星土壤内的气流:颗粒努森压缩机实验
DOI:
10.1007/s10509-017-3154-4
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发表时间:
2017
影响因子:
1.9
通讯作者:
G. Wurm
中科院分区:
文献类型:
--
作者:
Marc Koester;T. Kelling;J. Teiser;G. Wurm
Thermal creep efficiently transports gas through Martian soil. To quantify the Martian soil pump we carried out laboratory analog experiments with illuminated granular media at low ambient pressure. We used samples of 1 μm to 5 μm SiO2 (quartz), basalt with a broad size distribution between 63 μm and 125 μm, and JSC-Mars 1A with a size fraction from 125 μm to 250 μm. The mean ambient pressure was varied between 50 Pa and 9000 Pa. Illumination was varied between 100W/m2$100~\mbox{W}/\mbox{m}^{2}$ and 6700W/m2$6700~\mbox{W}/\mbox{m}^{2}$. The experiments confirm strong directed gas flows within granular and dusty soil and local sub-soil pressure variations. We find that Martian soil pumps can be described with existing models of thermal creep for capillaries, using the average grain size and light flux related temperatures.
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影响因子:
19.6
作者:
de Beule, Caroline;Wurm, Gerhard;Teiser, Jens
通讯作者:
Teiser, Jens
影响因子:
3.2
作者:
M. Küpper;G. Wurm
通讯作者:
G. Wurm
影响因子:
3.2
作者:
C. de Beule;G. Wurm;T. Kelling;M. Köster;M. Kocifaj
通讯作者:
M. Kocifaj
DOI:
10.1088/0004-637x/783/2/111
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
作者:
T. Kelling;G. Wurm;M. Köster
通讯作者:
M. Köster