Spatial discretization has failed. Discretization supports only parabolic and elliptic equations, with flux term involving spatial derivative. error
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my boundries are
a(1)=1 a'(0)=0
b(1)=0 b'(0)=0
the code i used is
function [pl,ql,pr,qr] = pdex4bc(~,ul,~,ur,~)
pl = [0;ul(1)-1];
ql = [1;0];
pr = [0;ur(2)];
qr = [1;0];
but i get this following error
Spatial discretization has failed. Discretization supports only parabolic and elliptic equations, with flux term involving spatial derivative
what is the wrong i did
3 Comments
Torsten
on 4 Mar 2022
pl = [0;0];
ql = [1;1];
pr = [ur(1)-1;ur(2)];
qr = [0;0];
sets
a'(0) = 0, b'(0) = 0, a(1) = 1, b(1) = 0
And I think
F1=-9.*phi.^2.*(u(1)./1+u(1)+u(2));
F2=-9.*al.^2.*(u(2)./1+u(1)+u(2));
should read
F1=-9.*phi.^2.*u(1)./(1+u(1)+u(2));
F2=-9.*al.^2.*u(2)./(1+u(1)+u(2));
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