论文标题
同位素级别：实验和理论证明气流在蒸发过程中的同位素分馏的潜在重要性
Isotope velocimetry: Experimental and theoretical demonstration of the potential importance of gas flow for isotope fractionation during evaporation of protoplanetary material
论文作者
论文摘要
我们使用新的实验和结果进行理论分析，以表明与激光加热空气动力学悬浮实验相关的同位素分馏与流动气体的速度是分馏的主要控制。新的FE和MG同位素数据被很好地解释了气体被视为低粘度流体，该低粘度流体以高雷诺数数量和最小的阻力在熔融球周围流动。基于此分析，获得了逆风速度与热速度与热速度的比率之间的关系。控制分级分级的流速与热速度之比的认识允许外推到其他环境，在这种环境中，熔融岩石遇到带有明显逆风的气体。通过这种方式，在某些情况下，蒸发的同位素分馏程度与晴雨表一样多。
We use new experiments and a theoretical analysis of the results to show that the isotopic fractionation associated with laser-heating aerodynamic levitation experiments is consistent with the velocity of flowing gas as the primary control on the fractionation. The new Fe and Mg isotope data are well explained where the gas is treated as a low-viscosity fluid that flows around the molten spheres with high Reynolds numbers and minimal drag. A relationship between the ratio of headwind velocity to thermal velocity and saturation is obtained on the basis of this analysis. The recognition that it is the ratio of flow velocity to thermal velocity that controls fractionation allows for extrapolation to other environments in which molten rock encounters gas with appreciable headwinds. In this way, in some circumstances, the degree of isotope fractionation attending evaporation is as much a velocimeter as it is a barometer.
