![pdepe.PNG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/267441/image.png)
Please help! pdepe does not stop!!
1 view (last 30 days)
Show older comments
Hello guys, I trying solve below question with pdepe and whe I run the code as mantioned in the below code, it never stop working.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/254841/image.png)
v = 49 680 m/day
kd = 0.24 1/day
ks = 58,8 m/day
h = 5 m
C(t = 0,x) = 13.75 mg/L initial condition
C(t, x = 0) = 13.75 mg/L
C(t, x = 1000m) = 10.05 mg/L
clc
clear
x = linspace(0,1000,1000);
t = linspace(0, 7, 28);
m = 0;
sol = pdepe(m, @pde,@pdeic,@pdebc,x,t);
u = sol(:,:,1);
sol(1000,:);
plot(x, sol(1000,:))
function [c, f, s] = pde(x, t, C, dCdx)
c = 1/(0.575*24*3600);
f = C;
s = (0.24+2.45*24/5)/(0.575*24*3600)*C;
end
function u0 = pdeic(x)
u0 = 13.75;
end
function [pl,ql,pr,qr] = pdebc(xl,ul,xr,ur,t)
pl = ul - 13.75;
ql = 0;
pr = ur - 10.05;
qr = 0;
end
0 Comments
Answers (1)
Guru Mohanty
on 23 Jan 2020
Hi, I understand you are trying to solve this partial differential equation. You can do this by using pdepe. Here is a sample code.
clc
clear all;
x = linspace(0,1000,1001);
t = linspace(0, 7, 28);
m = 0;
sol = pdepe(m, @pde,@pdeic,@pdebc,x,t);
val=sol(28,:);
figure
surf(t,x,sol');
figure
plot(x,val);
function [u, f, s] = pde(x,t,u,dudx)
u = 1/(0.575*24*3600);
f = u;
s = (0.24+2.45*24/5)/(0.575*24*3600)*u;
end
function u0 = pdeic(x)
u0 = 13.75;
end
function [pl,ql,pr,qr] = pdebc(xl,ul,xr,ur,t)
pl = ul - 13.75;
ql = 0;
pr = ur - 10.05;
qr = 0;
end
![pdepe.PNG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/267441/image.png)
0 Comments
See Also
Categories
Find more on Partial Differential Equation Toolbox in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!