Timeline for Numerical solution to Differential equation
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Aug 24, 2023 at 0:36 | vote | accept | physicsu83 | ||
| Sep 13, 2019 at 5:20 | history | edited | Αλέξανδρος Ζεγγ | CC BY-SA 4.0 |
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| Sep 13, 2019 at 5:15 | answer | added | Bob Hanlon | timeline score: 2 | |
| Sep 12, 2019 at 18:27 | comment | added | bbgodfrey |
You are changing the question. Please open a new question that includes both the code above and the boundary condition at large r that you are trying to match. My guess is that you are trying to match a separatrix at large `r', which typically is difficult but possible numerically.
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| Sep 12, 2019 at 17:42 | comment | added | physicsu83 | Actually, my differential equation is a boundary value problem. With x[0.0001]=Pi and x[infinity]=0. So I used the shooting method and converted it into an initial value problem with x[0.0001]=Pi and x'[0.0001]=-(some guessed value). But my gussed value gives oscillation at large distance. But I need x[infinity]=0 not oscillation. | |
| Sep 12, 2019 at 17:35 | comment | added | march | I'm sorry but I don't understand your question. The solution is the solution. Are you talking about modifying your model so that it does that or defining a new function that is the solution above until $r=20$ and then zero afterward? (And what do you mean by zero? Do you mean it's at the origin after that or that the vertical component is zero?) | |
| Sep 12, 2019 at 17:20 | history | edited | physicsu83 | CC BY-SA 4.0 |
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| Sep 12, 2019 at 17:12 | comment | added | physicsu83 | Thank you very much. It worked. Do you have any idea that how I can get rid of oscillation at r>20? I need solution to be zero as like it is before r=20. | |
| Sep 12, 2019 at 17:03 | comment | added | march |
ParametricPlot[{x[r] /. First@sols4, D[x[r] /. First@sols4, r]} // Evaluate, {r, 0.00001, 100}]
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| Sep 12, 2019 at 16:45 | review | First posts | |||
| Sep 12, 2019 at 18:03 | |||||
| Sep 12, 2019 at 16:44 | history | asked | physicsu83 | CC BY-SA 4.0 |