Problem with a PDE harmonic oscillator.

2 ビュー (過去 30 日間)
Stephen
Stephen 2014 年 2 月 26 日
I am trying to get and graph numerical solutions to a PDE with an initial condition and two boundary conditions.
PDE: du/dt = -(h^2/4)*d^2u/dt^2+x^2*u
IC: u(x,0)=Exp[(a-b)(a-b)/(.32)]
BC: u(-10,t)=0 and u(10,t)=0
this is my attempt at coding.
function expde
m = 0;
x = linspace(0,1,5);
t = linspace(0,100,20);
sol = pdepe(m,@pdex1pde,@pdex1ic,@pdex1bc,x,t);
% Extract the first solution component as u.
u = sol(:,:,1);
surf(x,t,u)
title('Graph of Wave Function')
xlabel('Distance x')
ylabel('Time t')
% --------------------------------------------------------------
function [c,f,s] = pdex1pde(x,t,u,DuDx)
c = 1;
f = ((.1)^2/4)*DuDx;
s = x^2*u;
% --------------------------------------------------------------
function u0 = pdex1ic(x)
u0 = exp((x-.1)^2/.32);
% --------------------------------------------------------------
function [pl,ql,pr,qr] = pdex1bc(xl,ul,xr,ur,t)
pl = 0;
ql = -10;
pr = 0;
qr = 10;
it is pretty obviously not working. Can somebody explain what i am doing wrong? I would also like to plot u^2 instead of u but i don't know how. Any help would be greatly appreciated. I have working code in mathematica but i plan on expanding and editing a few terms that i will need matlab for. Thanks

回答 (0 件)

カテゴリ

Help Center および File ExchangeGeneral PDEs についてさらに検索

Community Treasure Hunt

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

Start Hunting!

Translated by