Thermal convection in the presence of a vertical magnetic field
Thermal convection in the presence of a vertical magnetic field
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DOI：
10.1007/s00707-007-0492-2
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发表时间：
2007-08
期刊：
影响因子：
2.7
通讯作者：
E. Güray;H. Tarman
中科院分区：
文献类型：
--
作者：
E. Güray;H. Tarman
在上下刚性板之间水平周期性对流箱的计算域中，数值模拟了热对流与垂直方向外部均匀磁场之间的相互作用。数值技术是基于早期开发的谱元法来模拟自然热对流。在这项工作中，它被扩展到磁对流问题。它的主要特点是使用重标勒让德-拉格朗日多项式插值展开的流动变量，除了压力的模态展开的低阶多项式，以避免复杂的交错网格的方法。该技术是在稳定的滚动和振荡对流制度，在文献中的各种实验和数值结果进行了验证。垂直磁场以这种方式抑制对流运动的效果已被证明。
The interaction between thermal convection and an external uniform magnetic field in the vertical is numerically simulated within a computational domain of a horizontally periodic convective box between upper and lower rigid plates. The numerical technique is based on a spectral element method developed earlier to simulate natural thermal convection. In this work, it is extended to a magnetoconvection problem. Its main features are the use of rescaled Legendre-Lagrangian polynomial interpolants in expanding the flow variables except the pressure for which a modal expansion in terms of lower order polynomials is used to avoid the complicated staggered grid approach. The technique is validated in the steady roll and oscillatory convective regimes where various experimental and numerical results are available in the literature. The effect of a vertical magnetic field in such a way to inhibit the convective motions has been demonstrated.