洛伦兹力或科氏力能抑制Rayleigh-Bénard对流；而二者共同作用时，洛伦兹力能打破旋转约束并促进对流。这种松弛效应控制着地球内部的对流行为；对该流动和传热强化现象的研究，是研究磁发电机理论和地磁起源的流体力学基础。.磁场松弛效应下流动和传热强化的产生并不依赖Pr数，已有的“相干结构增强”观点不适用于液态金属，也不能解释流动的增强。对此，本项目从“洛伦兹力抵消科氏力”和“Ekman-Hartmann层耦合作用”的角度，对强磁场、强旋转的Rayleigh-Bénard对流进行研究。采用直接数值模拟和实验研究，通过建立传热和流动标度率，研究速度和温度特征，分析力对流体微元和宏观流动的作用方式和规律，揭示流动和传热强化的物理机制；通过研究Ek数、Pr数对流动和传热特性的影响，验证现有高Pr数磁发电机对流模型的准确性和可靠性，并为液态金属磁发电机对流模型的选择和设计提供理论依据。

Either Lorentz or Coriolis force can inhibit and stabilize the Rayleigh-Bénard convection individually; however, when they are acting simultaneously, the Lorentz force can release the rotating constraint, with facilitating the convection and enhancing the heat transfer. This magnetorelaxation and the balance dominating by Lorentz and Coriolis forces governs the liquid metal convection in the earth's interior; to understand the flow and heat transfer properties in such convection is crucial to study the dynamo theory and explain the generation of geomagnetic field..In the presence of magnetorelaxation, the appearance of enhancement is independent on Pr number; the theory of "coherent structures manipulation" isn't applicable to liquid metal, and also can't clarify the velocity enhancement. So, in present study, the viewpoints of counteracting between Lorentz and Coriolis forces, and the coupling effects of Ekman-Hartmann layers are proposed to study the flow and heat transfer enhancement in Rayleigh-Bénard convection subjected to strong magnetic field and rapidly rotating . .With direct numerical simulation and preliminary experiments, by establishing the scaling law of velocity and heat transfer, the properties of velocity and temperature is investigated; by analyzing the effects of various forces on flow elements and global field, the mechanisms of heat transfer and flow enhancement will be presented. At last, via studying the effects of Ek and Pr numbers, the verification of accuracy and reliability on current high-Pr dynamo convection is conducted. Based on the presented studies, the theoretical evidences will be provided for reference in choosing and designing the convection model for liquid metal dynamo.