A new approach to field modelling

Language:
de dk es fr it cz ru cn


RSS Twitter YouTube Blogger Facebook Linkedin

Main > Application > Sample problems

Bent copper wire resistance

Calculation of bending effect on wire electrical resistance

Problem Type:
3D problem of DC conduction.

Geometry:

bent_copper_wire_resistance

All dimensions are in millimeters.

Given:
Copper electric conductivity σ = 56e6 S/m.
Current I = 100 A.

Problem:
Determine the resistance of the bent copper wire.

Solution:
The resistance R is equal to the ratio of voltage drop V to the current I
R = V / I [Ohm]
We apply normal current density jn = I / A (where A is a wire cross-section area) at current terminal and zero potential at ground terminal. DC conduction simulation yields the current terminal electric potential V.

Result:
Electric potential and current distribution in a wire:

Bent copper wire electrical resistance

Current terminal electric potential V = 0.00168 [V].
Resistance R = 0.00168 / 100 = 16.8 [uOhm].

Video

Watch online on YouTube.

Download Download simulation files.