Abstract:

Based on the COMSOL multiphysics software, a three dimensional simulation, coupling magnetic field, fluent and tritium profile fields, is carried out. In this simulation, a rectangle channel lithium lead flow is adopted to study the tritium dynamic of liquid lead lithium in a strong magnetic field. It shows that a strong jet flow appears near the conducting walls which are parallel to the magnetic field, the flows in core and near Hartmann wall remain stagnant. Therefore, the conduction effect of jet flow produces a rather lower tritium concentration near the conducting wall and a higher tritium concentration near Hartmann wall and in the core due to flow stagnancy. Hence, an asymmetrical volumetric tritium distribution is resulted.

Key words: Fusion reactor, Blankets, MHD, Tritium transport

摘要：

利用COMSOL Multiphysics软件实现磁场、导电流体、氚输运的多物理场耦合，研究了在强磁场下3维方管中锂铅流体内的氚输运及其分布。通过计算得到，锂铅流体在平行磁场方向的导电壁侧形成了射流，而在哈德曼壁侧及流体的芯部区域流动滞缓；射流的强对流效应使得在导电壁侧具有较低的氚浓度，而在哈德曼壁面侧及流体芯部具有较高的氚浓度累积，形成了不对称的氚浓度体分布。

关键词: 聚变堆, 包层, 磁流体, 氚输运