| Author | Message | ||
     Ingo Reinhold (ingo) New member Username: ingo Post Number: 2 Registered: 06-2006 |
Dear all, I'm trying to model an array of metal rods in an insulator. In contrast to all the solutions I consider the magnetic vector potential A to be present in the XY plane. Additionally I'm using the electrical potential to determine the E-field. I'm however running into problems, since the field do not look at all how they should. So here are couple of questions: (1) I have to write an expression for every direction, e.g. x and y components, because when I try to implement vectors FlexPDE tells me it can't handle the function. Since I'm looking at steady state I have to split into real and imaginary part for each equation. Right? (2) Since this is all a little off topic for me I found that paper suggesting building the a region around the rods that has current sources and the outer boundaries are split into top and bottom part (do I do this best with a FEATURE?) Then they suggest the boundary conditions to be nCurl(A)=0 on the upper and 1/mu(curl(Axn)=0 on the lower boundary. Both do not have any 2nd derivatives in it, so Natural(A) does not really work, right? So how do I set it up then? Thanks so much for any hint that gets me a little closer to the solution. Best regards, Ingo Reinhold | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 647 Registered: 06-2003 |
There is a discussion of magnetostatic equations in FlexPDE in our "Applications Manual", available for download from our bookstore page www.pdesolutions.com/bookstore.html. Perhaps this will answer some of your questions. |