According to the characters of the work of magnetic force, the concept of potential energy can be brought in the non conservative system-magnetic field.
根据磁力做功的特点，在非保守场———磁场中也可以引入势能的概念。
The results show that natural convection can be formed on condition that the body force acting on the fluid is a non-conservative one.
结果表明：只要流体所受体积力为非保守力，即可产生自然对流。
Natural convection is induced by non-conservative body force, which can be gravity, centrifugal or magnetic force;
自然对流是由非保守体积力驱动的流体流动，这种体积力可以是重力、离心力以及电磁场力等；
Natural convection is induced by non-conservative body force, which can be gravity, centrifugal or magnetic force;
自然对流是由非保守体积力驱动的流体流动，这种体积力可以是重力、离心力以及电磁场力等；
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