Earlier developed single fluid gas-dynamic model of solar wind–comet ionosphere interaction is applied to reveal some specifics in the morphology of the shocked “contaminated” solar wind region (cometosheath). The model is based on the Euler equations with added mass-loading, mass-loss and frictional force terms. Numerous reactions are taken into account in these terms including photoionization, charge transfer, dissociative recombination and ion-neutral frictional force. The electromagnetic terms are omitted, thus reducing the MHD single-fluid system of equations to gas-dynamic one. The used shock-fitting numerical scheme allows the separation of distinct areas formed by the considered interaction and exploration of their properties in detail. Attention is focused on the region between the shock wave and the contact surface as well as on the positions of these boundaries. Accurate examination of the distribution of density, temperature and velocity reveals spatial variations that resemble the variations registered by a number of spacecraft in the vicinity of comets. No specific comparisons with data are made at this stage. Two very first events of the Rosetta spacecraft’s crossing of the magnetic cavity boundary around Comet 67P/Churyumov–Gerasimenko are discussed using a “faux-transient” application of our steady-state model.

中文翻译：

---

重新审视太阳风-彗星相互作用的单流体建模：仔细观察彗星鞘

早期开发的太阳风-彗星电离层相互作用的单一流体气体动力学模型被应用于揭示受冲击的“受污染”太阳风区域（彗鞘）形态的一些细节。该模型基于欧拉方程，增加了质量载荷、质量损失和摩擦力项。在这些术语中考虑了许多反应，包括光电离、电荷转移、解离复合和离子中性摩擦力。省略了电磁项，从而将 MHD 单流体方程系统简化为气体动力学方程。所使用的冲击拟合数值方案允许分离由仔细考虑的相互作用和详细探索它们的特性形成的不同区域。注意力集中在冲击波和接触面之间的区域以及这些边界的位置。对密度、温度和速度分布的准确检查揭示了空间变化，类似于彗星附近许多航天器记录的变化。现阶段不与数据进行具体比较。使用我们稳态模型的“假瞬态”应用讨论了 Rosetta 航天器穿越 67P/Churyumov-Gerasimenko 彗星周围磁腔边界的两个最初事件。现阶段不与数据进行具体比较。使用我们稳态模型的“假瞬态”应用讨论了 Rosetta 航天器穿越 67P/Churyumov-Gerasimenko 彗星周围磁腔边界的两个最初事件。现阶段不与数据进行具体比较。使用我们稳态模型的“假瞬态”应用讨论了 Rosetta 航天器穿越 67P/Churyumov-Gerasimenko 彗星周围磁腔边界的两个最初事件。