ode solver with unknows coefficients

1 visualizzazione (ultimi 30 giorni)
Serhat Unal
Serhat Unal il 25 Set 2020
Commentato: Serhat Unal il 26 Set 2020
Hello!
I wonder if I have two coupled differential equations( ex. first orders) with two unknows coeffcients, which ode solver shouls I use for
this?
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!

Risposte (1)

Walter Roberson
Walter Roberson il 25 Set 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 Commento
Serhat Unal
Serhat Unal il 26 Set 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.

Accedi per commentare.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by