Computer Science
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...66..117j&link_type=abstract
Icarus (ISSN 0019-1035), vol. 66, April 1986, p. 117-124.
Computer Science
74
Fines, Mars Surface, Particle Size Distribution, Regolith, Thermal Conductivity, Gas Pressure, Grain Size, Mars Craters, Mars, Fines, Soil, Thermal Properties, Inertia, Surface, Regolith, Particles, Size, Conductivity, Laboratory Studies, Theoretical Studies, Diameters, Analogs, Comparisons
Scientific paper
Theoretical models are developed for the thermal conductivity of grains smaller than 30 microns diameter and over 1 mm diameter in order to aid in the understanding of the thermal inertia of the surface regolith of Mars. The thermal inertia is a function of the thermal conductivity of the surface materials, and is discussed in terms of pore sizes below and above the mean free path of gas molecules (GMFP). The models are limited to surface deposits which consist of non-bonded materials at Martian surface pressures. The calculations indicate that a particulate surface with grains having pores smaller than the GMFP will be proportional to the pore or grain size. The thermal conductivity of a surface made of grains larger than the GMFP will be independent of the particle size. The results for the larger grain sizes is supported by available laboratory data. Further experiments are recommended in order to test the validity of the models for the smaller grain surfaces.
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