Solve ODE with BC

3 views (last 30 days)
Sergio Manzetti
Sergio Manzetti on 3 Jun 2020
Edited: Sergio Manzetti on 8 Jun 2020
Hi, I would like to solve this ODE with initial conditions y=0 and y'=0, and boundary cond L=[0,1] using the given command:
syms x y(x)
% Define first and second derivatives for y
Dy = diff(y,x);
% Define differential equation
Diff = (1i*diff(y,x)-x)^2+x^2 == 0.326307*y;
% Set initial conditions
y = y(0) == 0;
Dy = diff(y,0) == 0;
% Solve differential equation and display
Uc_sym = dsolve(Diff, y, Dy);
display(['y = ',char(10),char(Uc_sym),char(10)])
Alternatively, check out this example in the documentation.
But I am not aware on how to include the BCs and how to make this script work at all.. Can someone help?
Thanks

Accepted Answer

Stephan
Stephan on 3 Jun 2020
Edited: Stephan on 3 Jun 2020
I doubt that your ode has an analytical solution - however here is a minimal working example of how to include BC's in a symbolic way:
syms y(x)
% Define first derivative for y
Dy = diff(y,x);
% Define differential equation
ode = y == Dy * x;
% Set conditions
conds = [y(0)==0, y(1)==2, Dy(0)==2, Dy(1)==2];
% Solve differential equation and display
sol = dsolve(ode, conds)
If you dont find an analytical solution use bvp4c instead to solve numeric.
  1 Comment
Sergio Manzetti
Sergio Manzetti on 8 Jun 2020
Edited: Sergio Manzetti on 8 Jun 2020
Thanks! Seems solving this problem with bvp4c is not easy at all, although the problem here and the BC conditions are quite straight forward presented.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

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

Start Hunting!