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detect flaw with eddy current
Posted Nov 17, 2010, 3:07 a.m. EST 1 Reply
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Hi,
I am making a simulation for detecting the full circumferential flaw in one tube. My modeling was built under the magnetic and electric fields. I use two coils. One is the exciter and another is the detector. I use the external current density in the area of exciter. I typed the value of current density(1e6A/m^2) in the blank. But why the current density(mef.Jephi) is changed into twice(2e6A/m^2) as shown in the equation view of the external current density? It is strange.
Attached is my model.
Looking forward to the answer. Thank you!
I am making a simulation for detecting the full circumferential flaw in one tube. My modeling was built under the magnetic and electric fields. I use two coils. One is the exciter and another is the detector. I use the external current density in the area of exciter. I typed the value of current density(1e6A/m^2) in the blank. But why the current density(mef.Jephi) is changed into twice(2e6A/m^2) as shown in the equation view of the external current density? It is strange.
Attached is my model.
Looking forward to the answer. Thank you!
Attachments:
1 Reply Last Post Nov 18, 2010, 1:30 a.m. EST
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Posted:
1 decade ago
Hi
check you version, and take a look at the equations, I suspect a typo inside COMSOL by a factor 2 in MEF for external currents, should be fixed by 4.1 I hope ;)
Workaround: divide your current by 2 in MEF external current load cases, for the time being
--
Good luck
Ivar
check you version, and take a look at the equations, I suspect a typo inside COMSOL by a factor 2 in MEF for external currents, should be fixed by 4.1 I hope ;)
Workaround: divide your current by 2 in MEF external current load cases, for the time being
--
Good luck
Ivar