MHD Analysis Of Metal Fluid

The first use of Magnetohydrodynamic (MHD) to the product's development is the USA, mainly for aerospace products. At present, the research and application of Magneto hydrodynamic have been very extensive. It seeped many domains, like military, aerospace, medicine, industry, nuclear power and so on.The metallic jet in this article is as a fluid based on the free surface to study. Because of the surface flow, it will generate surface updates, fluctuation etc. Phenomenon and cause the interface instability. The interaction of the current and magnetic field will generate Lorentz force in opposite direction of flow, that is the Magneto Hydrodynamics(MHD , MagnetoHydrodynamics) effect. This MHD effect can change the flow characteristics of fluid and cause pinch, distortion and so on changes to the fluid itself. These changes will sometimes to the whole system produce very big effect.This paper firstly has a summary and overview on the Magnetic fluid flow's numerical simulation method and elaborates the main methods in the magnetic fluid value research and the major problems we are facing. On the basis of the passive electromagnetic armor's Metal jet flow Magneto hydrodynamic mode, used the User-defined procedures in the MHD module carried by large computational fluid dynamics software FLUENT and used the scalar transport equation solver, we solve the magnetic fluid equation.We conducted a study of Liquid red copper metallic jet on the current density, electromagnetic force, velocity vector and volume fraction under large pulse current.Study shows that the magnetic field can restrain the movement direction of the metal jet at the free surface. At the flow direction, the Velocity become smaller and the shape from top to bottom is stretched and then the metal jet sputter to upward or downward. With the increase of pulse current work time, current density and electromagnetic force density will be decreased. Considered the fluid motion's instability, under a given environment coefficient, we had simulated and analyzed the velocity vector distributions and volume fraction under the magnetic field function. The results of these studies provide a good guide to the free surface metallic jet and magnetic fluid's flowing.