Recent content by MrManhattan

I am computing magnetic field around a thick conductor to do railgun force modeling. I am currently re-examining my magnetic field computation, and I have found some confusing results stemming from a fairly simple use of the Biot-Savart Law. The main issue is that the more nuanced application of...

...forgot to include the ANSYS vs. MATLAB comparison plots

Attached are some plots that show the ANSYS vs. MATLAB results. But more importantly, I've noticed an issue with the shape of the MATLAB results. When plotting these, I plot the magnetic field as a 3D surface where X is the width of the armature, Y is the height of the armature, and Z is the...

Yeah, it could be the result of a typo, but doesn't only show up in the result from the Waindok et. al. paper. It also shows up in the "railgun force equation" and the equation on Hyperphysics (I'm not married to the site, but they've always had accurate information in the past, so far as I've...

Okay, well I've mostly solved all of my issues. However, the idea that all is well hinges on a few assumptions that I'm not really comfortable with, and my results, while being on the same order of magnitude, are not particularly good compared to ANSYS. When I compute "equation 2" in the...

True. But in computing the armature force, there are two important quantities; the magnetic field that points in either the y or z directions ( up/down and left/right when the rails are pointing into the page ) and the current that flows through the armature. The magnetic field created by the...

Yes, it does sound like a conversion issue, but the difference is between two models computed from the same constants. I can check to make sure there's no difference, but there shouldn't be. No, but I will check that tomorrow when I have more time with the license. I just have my memory to go...

Hello, and thanks in advance for taking a look at my question. Generally, I am trying to make a railgun force model. Since railguns depend on the magnetic field created around the rails (and the resulting Lorentz force) I need to model the magnetic field created by the current that flows...

Thank you for the additional reference. That is another way I could do it if I find issues later on, but do you think there is a particular reason to take the integral directly? My understanding was that the "sin - sin" formula was an analytic solution to the integral. Thus (so long as you are...

Hello, First of all, this question does stem from graduate work, but it seems far too simple to tag "advanced". I am looking to write some code to simulate the force from a railgun. The first step in doing this (from a tutorial I found) is to find the magnetic field at any point within the...