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nonlinear oscillator rkfixed vs AdamsBDF

payman
13-Aquamarine

nonlinear oscillator rkfixed vs AdamsBDF

Hi Eveyone,

A nonlinear differential equation is solved using rkfixed and AdamsBDF in the attached worksheet. As can be seen on the plots, they return entirely different solutions. The stable solution is reached with rkfixed but not with AdamsBDFF within the specified time period. I wonder which function returns the correct answer.

Your advice is highly appreciated.

All at its best,

From Payman.

AdamsBDF.pngrkfixed.png

2 REPLIES 2
VladimirN
23-Emerald IV
(To:payman)

What is the initial setting of the problem that you want to solve with the program?

-MFra-
21-Topaz I
(To:payman)

answer to Payman 1.jpg

answer to Payman 2.jpg

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