KOSI. [Comet simulation]
KOSI. [Comet simulation]
复制标题
科西。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
W. Markiewicz
中科院分区：
文献类型：
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作者：
H. Keller;W. Markiewicz
科西实验讨论的角度来看，它们可能的应用彗星科学。比较科西和彗星的尺度和几何形状，很明显，任何全球彗星特征的实验室模拟是不可能的。为了表明过程模拟的困难，作者详细讨论了升华冰/尘埃样品产生的气流的性质，气体与发射颗粒的相互作用以及样品内的热传输。一些重点放在气体-颗粒相互作用，表明大颗粒必须非常蓬松（分形），如果气体阻力是负责他们的排放。
KOSI experiments are discussed from the point of view of their possible applications to cometary sciences. Scales and geometries of KOSI and comets are compared, making it obvious that laboratory simulation of any global cometary features is impossible. To indicate the difficulties in process simulation, the authors discuss in some detail the properties of the gas flow generated by the sublimating ice/dust samples, the interaction of the gas with the emitted grains and heat transport within the sample. Some emphasis is laid on the gas-grain interaction showing that large grains have to be very fluffy (fractal) if gas drag is responsible for their emission.