磁场影响下的塞贝克效应驱动液态金属对流的实验研究
收稿日期: 2024-03-04
修回日期: 2024-04-24
网络出版日期: 2024-05-29
基金资助
国家自然科学基金(52376155)
Experimental study of liquid metal convection driven by Seebeck effect under the influence of magnetic field
Received date: 2024-03-04
Revised date: 2024-04-24
Online published: 2024-05-29
张登科 , 王增辉 . 磁场影响下的塞贝克效应驱动液态金属对流的实验研究[J]. 中国科学院大学学报, 2026 , 43(2) : 164 -172 . DOI: 10.7523/j.ucas.2024.032
In a fusion reactor environment characterized by significant temperature variations and intense magnetic fields， the Seebeck effect interacts with the magnetic field， propelling the flow of liquid metal to remove impurities and heat generated during the fusion reaction. This paper conducts experiments on thermoelectric convection driven by the Seebeck effect in a horizontal magnetic field. GaInSn and constantan serve as the experimental working substances. An ultrasonic Doppler velocimetry system meticulously measures the convection velocity in a closed cavity. Three thermoelectric convection modes are identified. At lower magnetic fields， thermoelectric effects dominate the convective mode， allowing for an approximation as a two-dimensional flow. With increasing magnetic field strength， the convective mode transitions to a three-dimensional pattern exhibiting variable velocity fluctuations. Subsequently， it converts to an approximate two-dimensional flow， influenced by the magnetic damping effect under strong magnetic fields. The Lorentz force， resulting from the interaction between the thermoelectric effect and the magnetic field， can enhance heat transfer. However， under stronger magnetic fields， it has an inhibiting effect on heat transfer.
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