12. Tube Coils - Absolute - (TBCALC.EXE)

Analytic Modelling Methods - Absolute Coils Coaxial with Metallic Tubes

An Example of a geometry modeled by an analytic solution to Maxwell's electromagnetic equations that govern eddy current testing is shown below:

This solution calculates the voltage induced in a coaxial Receive Coil (R) generated by a time harmonic (sinusoidal) current carried by another coaxial Transmit Coil (T). An impedance Coil can be simulated by allowing coils T and R to occupy the same physical space.

Materials in the Simulation are linear, homogeneous and isotropic. Operating Frequencies are relatively low (< ~ 2 MHz)

The executable program below calculates the voltage induced in one coil (receive coil) due to time-harmonic current in another coil (transmit-coil) and eddy current in coaxial tubes. Outputs are the real and imaginary components of the receive coil voltage (basic voltage values and normalized voltages with respect to the probe coils in free space). To make the program work, download the file and re-name the file name extension to ".exe". The calculations are analytical based on closed form solutions to Maxwell's electromagnetic equations.