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首页> 外文期刊>The Astrophysical journal >Hydrodynamics of Cloud Collisions in Two Dimensions: The Fate of Clouds in a Multiphase Medium
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Hydrodynamics of Cloud Collisions in Two Dimensions: The Fate of Clouds in a Multiphase Medium

机译：二维云碰撞的流体动力学：多相介质中云的命运

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By contrast, for symmetric radiative cases, we find that the two clouds coalesce, and there are good chances for a new massive cloud to be formed. Almost all the initial kinetic energy of the two clouds is radiated away during such collisions. On the other hand, for both adiabatic and radiative collisions, symmetry breaking leads to major differences. Most importantly, asymmetric collisions have a much greater tendency to disrupt the two clouds. Portions of individual clouds may be sheared away, and instabilities along the interfaces between the clouds and with the intercloud medium are enhanced. In addition, radiative cooling is less efficient in our asymmetric interactions, so that those parts of the clouds that initially seem to merge are more likely to reexpand and fade into the warm intercloud medium.
机译：相比之下，对于对称辐射情况，我们发现两朵云融合在一起，并且有形成新的大质量云的良好机会。在这种碰撞过程中，两朵云的几乎所有初始动能都被辐射掉了。另一方面，对于绝热碰撞和辐射碰撞，对称破坏都会导致重大差异。最重要的是，非对称碰撞具有破坏两朵云的更大趋势。各个云的部分可能会被剪掉，沿云之间以及与云间介质之间的界面的不稳定性会增强。此外，辐射冷却在我们的非对称相互作用中效率较低，因此，最初似乎合并的那些云部分更有可能重新膨胀并消失到温暖的云间介质中。

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