21-Topaz II

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How to improve the solution of a two differential equations system?

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Hello everyone,
how do i get the same solutions of the system in two differential equations, changing the odesolve algorithm since they vary as it changes? It's possible?

I thank you all.

Greetings.

two eqdif system.jpg

1_two-eqdif-system.zip

Mathcad Usage
Calculus_Derivatives
Chemical_Engineering

AlanStevensAnswer

19-Tanzanite

If you do a little rescaling you find the result is independent of the algorithm.

ttokoro

21-Topaz I

The shape is depend on TOL= 10-1 to 10-7. Prime 7.

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t.t.

AlanStevens

Answer

19-Tanzanite

If you do a little rescaling you find the result is independent of the algorithm.

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1_two-eqdif-system_b.zip

-MFra-

Author

21-Topaz II

Your results are the same as those obtained with the "Fixed" or "Adaptive" algorithms so I choose one of the two without changing anything. Anyway, thank you very much for the helpful advice.

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How to improve the solution of a two differential equations system?

3 replies

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