磁场影响下的塞贝克效应驱动液态金属对流的实验研究OA

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.