Cylindrical needle to plane electric field
QuickField simulation example
Problem Type
Axisymmetric problem of electrostatics.
Geometry
Distance from needle tip to plane surface - 5 mm.
Given
Relative permittivity of air ε = 1;
Needle potential U = 10 kV
Plate potential 0 V
Task
Determine the electric field strength distribution as a function of needle diameter d.
Solution
Parametric analysis is automated with LabelMover tool.
Results
Electric potential distribution around the needle, d=2 mm.
| Needle diameter d, mm. | 2 | 6 | 10 | 22 |
| Electric stress at the needle tip, kV/mm. | 9.7 | 4.6 | 3.5 | 2.6 |
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