A numerical study of unidirectional solidification of a binary metal alloy under influence of a rotating magnetic field

Efficient Melt Stirring Using Pulse Sequences of a Rotating Magnetic Field: Part II. Application to Solidification of Al-Si Alloys

“…The mean-time meridional flow consists of two dominating toroidal vortices. [10] Due to the Ekman pumping effect, the secondary flow close to the lateral walls is directed toward the mushy zone where it is transformed into a strong radial flow at the upper part of the mushy zone. This flow conveys solute, which is rejected at the solidification front toward the axis of the cylinder.…”

“…The problem of macrosegregation has already been investigated specifically for the case of an RMF-driven melt flow [1,10,11] too. Here, this phenomenon is attributed to the secondary flow driven by the Ekman pumping specifically arising in a rotating fluid.…”

Modelling of solidification of binary fluids with non-linear viscosity models

“…Alternatives for this approach are rarely presented in the literature, two examples given in Refs. [4,9] will be shortly discussed below. In the case of the first parametrisation, the mixture viscosity μ is approximated by a piecewise functional approach, cf.…”

“…Refs. [3,4], respectively. These two physical models are valid in different regions of the mushy layer: the region of stationary, columnar crystals where the solid velocity is u s = 0 and the region of the equiaxed crystals where the velocity of solid is assumed to be equal to the velocity of the melt u s = u l , see Fig.…”

Effect of frequency and intensity of rotating magnetic field on the microstructures of Pb-Sn alloys

“…Kishida et al [11] studied the effect of stationary magnetic field on microstructure of Pb-Sn alloy, and found that columnar structure fraction increased with the increase of the magnetic intensity, which made the equiaxed crystal coarsen at the same time. The convection driven by RMF caused a transition of primary phase from columnar-to-equiaxed growth of Pb-Sn alloy [12,13] . Xu et al [14] investigated the solidification cooling curve of Sn-Sb alloy with RMF, and found that the effects of RMF on liquid alloy include heat dissipation, warming-up and outwashing casting mould wall.…”