Patterned turbulence in liquid metal flow: computational reconstruction of the Hartmann experiment.
Patterned turbulence in liquid metal flow: computational reconstruction of the Hartmann experiment.
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DOI：
10.1103/physrevlett.110.084501
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发表时间：
2013-02
影响因子：
8.6
通讯作者：
D. Krasnov;A. Thess;T. Boeck;Yurong Zhao;O. Zikanov
中科院分区：
文献类型：
--
作者：
D. Krasnov;A. Thess;T. Boeck;Yurong Zhao;O. Zikanov
我们目前的数值分析结果哈特曼的历史实验的影响下，磁场的汞在管道和导管的流动。计算的层流-湍流转捩的临界参数以及摩擦系数与Hartmann的数据非常吻合。模拟提供了实验上无法达到的流动结构的第一个详细视图。发现了在平行于磁场的侧壁附近具有局部湍流斑的新型流型和层流。最后，我们建议如何在透明的流体中使用光流测量这些预测进行测试。
We present results of a numerical analysis of Hartmann's historical experiments on flows of mercury in pipes and ducts under the influence of magnetic fields. The computed critical parameters for the laminar-turbulent transition as well as the friction coefficients are in excellent agreement with Hartmann's data. The simulations provide a first detailed view of the flow structures that are experimentally inaccessible. Novel flow regimes with localized turbulent spots near the sidewalls parallel to the magnetic field and otherwise laminar flow are discovered. We finally suggest how these predictions can be tested in a transparent fluid using optical flow measurement.