Magnetothermal Wind Visualized by Numerical Computation
Titel:
Magnetothermal Wind Visualized by Numerical Computation
Auteur:
Akamatsu, M. Higano, M.
Verschenen in:
Journal of visualization
Paginering:
Jaargang 10 (2008) nr. 3 pagina's 261-270
Jaar:
2008-07-06
Inhoud:
This study describes the numerical evaluation of the transient and steady state characteristics of a magnetothermal wind created by the Kelvin force inside the bore space of a super-conducting magnet. The model system designed to evaluate the present numerical computations is composed of two coaxial circular pipes with open ends. The outer pipe, acting as the cooling pipe, corresponds to the bore space of the super-conducting magnet, while the inner pipe, acting as the heating pipe, is installed inside this bore space. The vertical magnetic gradient generated in the bore space as a source of the Kelvin force was replaced by that generated by the electric current circulating within the circular electric coil. The computed results indicated that the generation direction, the flow rate, and the flow pattern of the magnetothermal wind strongly depended on the position of the circular electric coil. For instance, when the circular electric coil was placed at the lower end of the heating region, the free convection was accelerated by the Kelvin force and an upward magnetothermal wind with a maximum flow rate was created. On the other hand, when the circular electric coil was placed at the upper end of the heating region, the free convection was suppressed by the Kelvin force and a downward magnetothermal wind was created.
Tijdschrift beschrijving