Abstract In “An Approach to Verification and Validation of MHD Codes for Fusion Applications” [S. Smolentsev et al., Fusion Eng. Des., Vol. 100, p. 65 (2015)], an effort for verification and validation of computer codes for liquid metal flows in a magnetic field for fusion cooling/breeding applications was initiated. The current study continues that effort. A group of experts in computational magnetohydrodynamics from several institutions in the United States and Europe performed a code-to-code comparison for the selected reference case of a mixed-convection buoyancy-opposed magnetohydrodynamic flow of eutectic lead-lithium (PbLi) alloy in a thin-wall conducting square duct at Hartmann number Ha = 220, Reynolds number Re = 3040, and Grashof number Gr = 2.88 × 107. As shown, the reference flow demonstrates a boundary layer separation in the heated region and formation of a reversed flow zone. The results of the comparison suggest that all five solvers predict well the key flow features but have moderate quantitative differences, in particular, in the location of the separation point. Also, two of the codes are more computationally dissipative, showing no velocity and temperature oscillations.

中文翻译：

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PbLi 混合对流 MHD 流的代码间比较

摘要在“用于融合应用的 MHD 代码验证和验证方法”[S. Smolentsev 等人，Fusion Eng。设计，卷。100 页。65 (2015)]，启动了对用于聚变冷却/增殖应用的磁场中液态金属流动的计算机代码的验证和验证工作。目前的研究继续这一努力。来自美国和欧洲多个机构的一组计算磁流体动力学专家对所选参考案例的共晶铅锂 (PbLi) 合金的混合对流浮力反对磁流体动力学流动进行了代码到代码比较。哈特曼数 Ha = 220，雷诺数 Re = 3040，格拉肖夫数 Gr = 2.88 × 107 的薄壁导电方管。 如图所示，参考流表明在加热区边界层分离并形成反向流动区。比较结果表明，所有五个求解器都很好地预测了关键流动特征，但具有适度的定量差异，特别是在分离点的位置。此外，其中两个代码在计算上更加耗散，没有显示速度和温度振荡。