Numerical models are used to investigate behavior of a solid body or liquid droplets suspended in AC and DC magnetic fields of various configurations providing conditions similar to microgravity.The realistic gradient...Numerical models are used to investigate behavior of a solid body or liquid droplets suspended in AC and DC magnetic fields of various configurations providing conditions similar to microgravity.The realistic gradient fields,as in superconducting magnets,are used for the modeling experiments with electrically conducting droplets.The oscillations in a high DC magnetic field are different for an electrically conducting droplet.At the high values of magnetic field some oscillation modes are damped quickly,while others are modified with a considerable shift of the oscillating droplet frequencies and the damping constants from the non-magnetic case.On a larger scale,the models are used to investigate the melting process of reactive materials,for example titanium alloys.If the contact is avoided,thermal losses could be limited only by radiation and possible evaporation.展开更多
A fully coupled 3-dimensional numerical model is used to analyse the effect of magnetic field orientation on dendritic growth.For materials that exhibit a significant thermoelectric power,the results show significant ...A fully coupled 3-dimensional numerical model is used to analyse the effect of magnetic field orientation on dendritic growth.For materials that exhibit a significant thermoelectric power,the results show significant differences in the dendritic morphology for different orientations of the field.These variations can be attributed to fluid flow generated through Thermoelectric Magnetohydrodynamics.A simplified,steady-state,low-field solution during the early stages of growth is used to describe how the fluid flow alters with the orientation of the field and how these flow features can lead to the final morphologies for well developed dendrites.展开更多
文摘Numerical models are used to investigate behavior of a solid body or liquid droplets suspended in AC and DC magnetic fields of various configurations providing conditions similar to microgravity.The realistic gradient fields,as in superconducting magnets,are used for the modeling experiments with electrically conducting droplets.The oscillations in a high DC magnetic field are different for an electrically conducting droplet.At the high values of magnetic field some oscillation modes are damped quickly,while others are modified with a considerable shift of the oscillating droplet frequencies and the damping constants from the non-magnetic case.On a larger scale,the models are used to investigate the melting process of reactive materials,for example titanium alloys.If the contact is avoided,thermal losses could be limited only by radiation and possible evaporation.
文摘A fully coupled 3-dimensional numerical model is used to analyse the effect of magnetic field orientation on dendritic growth.For materials that exhibit a significant thermoelectric power,the results show significant differences in the dendritic morphology for different orientations of the field.These variations can be attributed to fluid flow generated through Thermoelectric Magnetohydrodynamics.A simplified,steady-state,low-field solution during the early stages of growth is used to describe how the fluid flow alters with the orientation of the field and how these flow features can lead to the final morphologies for well developed dendrites.
