Table 1.
Simulation conditions.
| Model | Parameter | Value |
|---|---|---|
| Tube | Outer diameter | 82 mm |
| Inner diameter | 70 mm | |
| Wall thickness | 6 mm | |
| Relative permeability | 329.5 | |
| Conductivity | 0.5 × 107 S/m | |
|
| ||
| Sensor | Axial current density | 8.2 × 106 A/m2 |
| Circumferential current density | 1.6 × 106 A/m2 | |
| Axial current waveform | Sinusoid, frequency 30 Hz and phase 0 ° | |
| Circumferential current waveform | Sinusoid, frequency 30 Hz and phase 90 ° | |
|
| ||
| Defect | Direction | Axial and circumferential |
| Size | Length 10 mm, width 0.5 mm and depth 1.8 mm | |
| Location | 246 mm away from exciting coil | |