Timeline for NDSolve::nlnum and NDSolve::bcedge
Current License: CC BY-SA 4.0
7 events
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| Jul 2 at 3:17 | comment | added | Repentanze | @xzczd Thanks, I think I'm getting it. Now it seems the same problem as NDSolve needs to process with the derivative of some Piecewise function. | |
| Jul 1 at 14:11 | history | edited | xzczd♦ |
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| Jul 1 at 14:08 | comment | added | xzczd♦ |
...: mathematica.stackexchange.com/a/71945/1871 2. The second PDE is just a variation of heat equation (n2 doesn't even involve in here), to determine a solution, boundary condition at z==1 and z==-1 is necessary.
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| Jul 1 at 14:04 | comment | added | xzczd♦ |
"I'm not sure if the two problems are related." They're not related at all. The first question is essentially the same as this previous question of yours: tieba.baidu.com/p/8984592306 , and has been discussed in this site quite a bit, the most recent one is this: mathematica.stackexchange.com/a/304563/1871 , so the simplest answer is, as mentioned in the posts above, use Simplify`PWToUnitStep. As to the second question, as pointed out by Nasser below, your ic and bc is a mess. I can spot at least 2 problems: 1. n1[1, 0] == 0 is not a well-posed constraint in 2D space: ...
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| Jul 1 at 9:13 | vote | accept | Repentanze | ||
| Jul 1 at 7:32 | answer | added | Nasser | timeline score: 1 | |
| Jul 1 at 6:41 | history | asked | Repentanze | CC BY-SA 4.0 |