• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Meteoritics & planetary science >Maximal size of chondrules in shock wave heating model: Stripping of liquid surface in a hypersonic rarefied gas flow
【24h】

Maximal size of chondrules in shock wave heating model: Stripping of liquid surface in a hypersonic rarefied gas flow

机译：冲击波加热模型中的软骨最大尺寸：高超声速稀薄气流中的液面剥离

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We examined partially molten dust particles that have a solid core and a surrounding liquid mantle, and estimated the maximal size of chondrules in a framework of the shock wave heating model for chondrule formation. First, we examined the dynamics of the liquid mantle by analytically solving the hydrodynamics equations for a core-mantle structure via a linear approximation. We obtained the deformation, internal flow, pressure distribution in the liquid mantle, and the force acting on the solid core. Using these results, we estimated conditions in which liquid mantle is stripped off from the solid core. We found that when the particle radius is larger than about 1-2 mm, the stripping is expected to take place before the entire dust particle melts. So chondrules larger than about 1-2 mm are not likely to be formed by the shock wave heating mechanism. Also, we found that the stripping of the liquid mantle is more likely to occur than the fission of totally molten particles. Therefore, the maximal size of chondrules may be determined by the stripping of the liquid mantle from the partially molten dust particles in the shock waves. This maximal size is consistent with the sizes of natural chondrules.
机译：我们检查了部分熔融的尘埃颗粒，这些颗粒具有实心的核和周围的液体地幔，并在冲击波加热模型的框架中估计了球粒的最大尺寸，以形成球粒。首先，我们通过线性逼近来解析求解地幔的流体动力学方程，从而研究了地幔的动力学。我们获得了变形，内部流动，液幔中的压力分布以及作用在固体核上的力。利用这些结果，我们估计了从固体核中剥离出地幔的条件。我们发现，当颗粒半径大于大约1-2毫米时，预计剥离将在整个粉尘颗粒熔化之前发生。因此，冲击波加热机制不太可能形成大于约1-2 mm的弦状。此外，我们发现，与完全熔融的粒子裂变相比，更容易发生液幔的剥离。因此，可以通过从冲击波中的部分熔融的尘埃颗粒中除去液罩来确定软骨的最大尺寸。该最大尺寸与天然软骨的尺寸一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号