Table 1
Geometrical and physical parameters of the device.
| Billet radius (R 1 ) | 38 mm |
|---|---|
| Outer radius of ferromagnetic yoke | 76 mm |
| Air gap thickness (e) | 2 mm |
| Permanent magnet thickness | 5 mm |
| Magnet opening angle (Β) | 53.13° |
| Device length (l) | 50 mm |
| Vacuum permeability (μ 0) | 4π. 10−7 T /m |
| Pole number (2p) | 4 |
| Billet electrical conductivity (σ) | 3774. 107 S/m |
| Magnet remanent (Nd-Fe-B) (M 0) | 1.21 T |
| Thermal Conductivity of the billet (λ) | 260 W/m K |
| Specific heat of the billet (C p ) | 936 J/kg K |
| Mass density of the billet (ρ) | 2707 kg/m3 |
| Aluminum thermal coefficient(α) | 4.03. 10−3 K−1 |
| Thermal convective coefficient (h) | 14.3 W/m2 K |
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