This validation case is the result of the study of a working group of COFREND (French Confederation for Non-Destructive Testing). This group "modeling of Eddy currents" aims at proposing benchmarks gathering simulations and experiments results allowing the validation of Eddy currents simulation codes.
A specifical surface model (Boundary Element Method), more efficient and more accurate than a volume model for thin flaws has been used in this study.
Both tables below gather calibrated results for the « F5 » calibrated flaw at 100 kHz and 300 kHz. The figure on the bottom of this page shows results curves obtained with CIVA and the experiment. A good agreement is observed between simulation and experiment.
COMPARISON between CODES
Comparisons between CIVA, C3D and Flux for channels at 100 and 300 kHz
The agreement is satisfactory between the 3 codes and the experiment with a difference less than 10% for all the cases.
These results are taken from the article Working Group COFREND "Eddy Current NDT modeling": benchmarks for validation and improving simulation codes acceptation presented to the ECNDT in 2014.
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