• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >A 3-D MODEL FOR MAGNTIC DAMPING OF G-JITTER INDUCED CONVECTION AND SOLUTAL TRANSPORT IN A SIMPLIFIED BRIDGMAN CONFIGURATION
【24h】

A 3-D MODEL FOR MAGNTIC DAMPING OF G-JITTER INDUCED CONVECTION AND SOLUTAL TRANSPORT IN A SIMPLIFIED BRIDGMAN CONFIGURATION

机译：简化布里奇曼构型中G激振对流和溶质输运的3D电磁阻尼模型

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

A 3-D transient finite element model is developed to represent the oscillating thermal convection induced in a simplified Bridgman configuration filled with a Ga-doped germanium melt in microgravity under the influence of an external magnetic field. The model development is based on the penalty-finite element solution of the equations describing the transport of momentum, heat and solution and also the electromagnetic field distribution in the melt pool. Automatic time step control is applied to help speed up the calculations. Numerical performance of finite element simulations for this class of problems is discussed. In particular, various types of finite element formulations were studied to minimize the global matrix size and to investigate the computational efficiency. Numerical simulations are conducted to study the convection and magnetic damping effects as a function of frequency, directions and amplitudes of g-jitter and also the direction and magnitudes of the applied magnetic fields. The results show that the g-jitter driven flow is time dependent and complex convection pattern can develop in a 3-D configuration even when the thermal conditions are symmetric and that the convection can be suppressed with an applied magnetic field.
机译：建立了一个3-D瞬态有限元模型，以表示在外部磁场的影响下，在简化的Bridgman构造中诱发的振荡热对流，该构造中充满了微重力下的Ga掺杂锗熔体。该模型的开发基于方程的罚分有限元解，该方程描述了动量，热量和溶液的传输以及熔池中的电磁场分布。应用自动时间步控制来帮助加快计算速度。讨论了针对此类问题的有限元模拟的数值性能。特别是，对各种类型的有限元公式进行了研究，以最小化整体矩阵的大小并研究计算效率。进行了数值模拟，以研究对流和磁阻尼效应与频率，g抖动的方向和幅度以及所施加磁场的方向和幅度的关系。结果表明，即使在热条件对称的情况下，g抖动驱动的流量也与时间有关，并且即使在热条件对称的情况下，复杂的对流模式仍会以3D形式出现，并且可以通过施加磁场抑制对流。

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