کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
660981 | 1458145 | 2008 | 14 صفحه PDF | دانلود رایگان |
In the present numerical study the effect of constant transverse magnetic field on convection of low Prandtl number liquid metal rotating in a cubical cavity with an aspect-ratio of 8:8:1 has been investigated. The bottom wall is heated while the top-wall is cooled and all the other walls are kept thermally insulated. The governing equations of mass, momentum, energy and magneto-hydrodynamic for a frame rotating with the enclosure, subject to Boussinesq approximation applied to gravity and centrifugal force terms, have been solved on a collocated grid using a semi-implicit finite difference method. The simulations have been carried out for liquid metal flows having a fixed Prandtl number Pr=0.01Pr=0.01, Rayleigh number Ra=107Ra=107, and magnetic Prandtl number Pm=4.0×10-4Pm=4.0×10-4 while Chandrasekhar number Q varies from 5.0625×1045.0625×104 to 1.21×1061.21×106 and non-dimensional rotation rate ΩΩ is varied from zero to 105105.The increase in strength of transverse magnetic field (from Ql=5.0625×104Ql=5.0625×104 to Qh=1.21×106Qh=1.21×106) till Q≃TaQ≃Ta leads to slight increase in convective heat transfer as well as formation of two-dimensional coherent structures aligned along the direction of magnetic field. For cases pertaining to Q
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 15–16, 15 July 2008, Pages 4095–4108