| 高频行波磁场驱动低电导率液体流动的数值模拟 |
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| 作者姓名： | 郭胜荣 那贤昭 刘润聪 李勇 张香平 董海峰 戴晓天 巩秀芳 王晓东 |
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| 作者单位： | 1. 钢铁研究总院先进钢铁流程及材料国家重点实验室, 北京 100081;2. 中国科学院大学材料科学与光电技术学院材料科学与光电工程中心, 北京 100049;3. 中国科学院过程工程研究所绿色过程与工程重点实验室, 北京 100190;4. 东方汽轮机有限公司长寿命高温材料国家重点实验室, 四川 德阳 618000 |
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| 基金项目： | 国家自然科学基金(51574091)、中国科学院科研装备研制项目(YJKYYQ20200053)和工信部工业强基项目(DTCC28EE190929)资助 |
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| 摘 要： | 由两组线圈产生的高频行波磁场可用于驱动低电导率的液体，因此对其机理的研究具有重要意义。建立该驱动方式的数值模型，研究线圈电流大小、频率、相位差以及线圈间距对低电导率液体的流场与温度场的影响，从而获得最佳的电气参数配置以及线圈结构。模拟计算结果表明：流体的平均流速和平均温度与电流大小和频率均为线性关系。流体的平均流速随电流的相位差增加呈先增大后减小的规律，且在相位差为90°附近达到最大值。随着线圈间的距离变化，流场的分布形式从2个涡流转变为单个大环流。此外还采用粒子图像测速技术测量NaCl溶液在高频行波磁场驱动下的流场分布，验证该驱动方式的可行性和有效性。
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| 关 键 词： | 流动 强制对流 电磁搅拌 数值模拟 高频磁场 |
| 收稿时间： | 2021-01-25 |
| 修稿时间： | 2021-03-23 |
Numerical simulation of forced convection driven by high-frequency traveling magnetic field for low conductivity liquids |
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| Authors: | GUO Shengrong NA Xianzhao LIU Runcong LI Yong ZHANG Xiangping DONG Haifeng DAI Xiaotian GONG Xiufang WANG Xiaodong |
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| Abstract: | High frequency traveling magnetic field generated by two sets of coil can be applied as a new driving method for low conductivity liquid, therefore study on its mechanism is of great significance. In this paper, a numerical model is established to study the effects of current, frequency, phase difference， and coil distance on the flow field and temperature field of the low conductivity liquid being driven, so as to obtain the optimal electrical parameters configuration and coil structure for the driving task. The simulation results show that the average velocity and temperature of the fluid are linearly correlated with the magnitude and frequency of the current. The average velocity is maximized when the phase difference between the coils is near 90o. Depend on the coil distance, the flow field is either two vortices or a single large circulation. Particle image velocimetry (PIV) is also used to measure the flow field distribution of NaCl solution driven by high frequency traveling magnetic field, which verifies the feasibility and effectiveness of the driving method. |
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| Keywords: | flow forced convection electromagnetic stirring numerical simulation high-frequency magnetic field |
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