Thermal conductivity of porous aggregates
Thermal conductivity of porous aggregates
复制标题
多孔骨料的导热系数
DOI:
10.1051/0004-6361/201732182
复制
发表时间:
2017
影响因子:
6.5
通讯作者:
Nakamoto Taishi
中科院分区:
文献类型:
--
作者:
Arakawa Sota;Tanaka Hidekazu;Kataoka Akimasa;Nakamoto Taishi
ContextThe thermal conductivity of highly porous dust aggregates is a key parameter for many subjects in planetary science; it is not yet fully understood, however.AimsWe investigate the thermal conductivity of fluffy dust aggregates with filling factors lower than 10-1.MethodsWe determined the temperature structure and heat flux of the porous dust aggregates calculated throughN-body simulations of static compression in the periodic boundary condition.ResultsWe derive an empirical formula for the thermal conductivity through the solid networkksolas a function of the filling factor of dust aggregatesφ. The results reveal thatksolis approximately proportional toφ2, and the thermal conductivity through the solid network is significantly lower than previously assumed. In light of these findings, we must reconsider the thermal histories of small planetary bodies.
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