ode solver with unknows coefficients

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Serhat Unal
Serhat Unal le 25 Sep 2020
Commenté : Serhat Unal le 26 Sep 2020
I wonder if I have two coupled differential equations( ex. first orders) with two unknows coeffcients, which ode solver shouls I use for
I have tried using ode45, but I dont have initial values for this, so I wonder if there is an ode solver that could guess or implement that function?
Thanks, Hope for an answer!

Réponses (1)

Walter Roberson
Walter Roberson le 25 Sep 2020
In some situations, this can be coded as a Boundary Value Problem https://www.mathworks.com/help/matlab/boundary-value-problems.html?s_tid=CRUX_lftnav in which you are trying to find coefficient values that match some known behaviour.
But in the more general case, you cannot use numeric methods because you are modeling a class of problems, and you have to hope that the Symbolic Toolbox dsolve() can figure out a useful solution for you.
  1 commentaire
Serhat Unal
Serhat Unal le 26 Sep 2020
thanks for the answer.
I forgot to mention that it was a brusselator problem and
I want to make a 2d plot of these two coupled first order odes, but still does not
have any initial values or boundary conditions, but is there a way to still use any ode solver
and how would the code look like in this case.

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