Validating Ansys Maxwell: In-Depth with TEAM 3 Test Case

Hello everyone, Ian from Ozen Engineering here. We're going to get right into building Team Workshop Problem Number Three. If you want to know what this is, what we're doing here, please check out the associated blog for some more information. And without further ado, let's start.

All right, let's really quickly build this thing up. It's a very basic geometry and setup, so this shouldn't be too hard. We're going to open up a 3D design. It should be an eddy current design. Next, I'm going to add the material.

The only information given to us on the design is that it's aluminum with a resistivity value of 0.3278 x 10^8 ohm meters. So we'll add that. Then, we'll take the reciprocal of that, and that's our bulk conductivity, set here. Next, we'll create the coil.

This is just the standard coil process, but you can also use a coil that's a little bit more flexible. So we're going to add a coil that's got a relatively high loss value of 1.8V, so that's just the subsonic rate of what you're going to be using.

We'll add a substantial problem and refine the mesh around this a little bit. To do that, all we need to do is make this a cylinder with a small diameter. Alright, next thing, let's add our analysis. We're going to make it a frequency sweep.

We'll go from 50 to 200, which means our adaptive frequency should be our high frequency, 200. We're going to go from 50 Hertz to 200. We'll do step sizes of 150 steps. Click OK. Last thing, check our eddy effects.

The goal is to calculate the field and eddy currents flowing around the limbs of the ladder. Let's keep this on. We don't need them for the cylinder in this case. Now, one last thing, it wants me to move the coils from two different positions.

So all I did was set up a parametric analysis where I sweep a movement vector that I put on the coil. Looking at the presentation of the result, it wants a center line 0.5 millimeters above the top of the surface of the connecting ladder, which is what I've drawn here.

It wants me to present the z direction of the B field along the line. So let's get that set up with the fields calculator. Very easily done. This is just grab your quantity B. It already has a scalar Z value for us. It wants it in millitesla.

Let's multiply this times 1, 000. So we'll grab a number, scalar of 1,000, and multiply that in. Last thing I want to do, we'll make it smooth. And this looks good. Let's add this. And with that, we are ready to run our test. Parametric setup. The simulation is complete.

So let's go ahead and prepare the report that the document wants. I'm going to just plot the z vector along that line. And both of the frequencies that we swapped and both of the positions that we plotted them in. Very easily done. Beautiful results. Let's carry on a little bit further.

The other thing that we're going to do is plot the current density on the surface of the plate. All right. Looks great. I also made a vector plot. I wanted to compare this to the LS Dyna version of the same experiment. Same maxima. We get very similar results.

Yeah, see, they actually hit the 12 millisieverts. The line with their experiment compared to their numerical values. Whereas for mine, and they're plotting off of their maximum from the phase and position that they had.

So if I look at my same version as the red curve here doesn't quite hit the 12 millisieverts. I'm here at 11.32 mT.

Now comparing this with the numerical result, this is the Problem 3 bath plate, Position 2 at 50 Hz, which is the curve that we chose there in red, 50 Hz, yep, position 2. And we can see it does look like the measured value, solid line, hits a little bit closer to what we have in our simulation.

Either way, I would say that we have good agreement with the measured values. That's going to be it for this one. If you guys have any questions or if there's anything that you want to see simulated, let us know in the comments below. Otherwise, this has been Ian from Ozen Engineering.

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