Asked by Kaelyn
on 3 Nov 2013

I am having trouble generating a coefficient matrix of different node types. Please take a look at my code and tell me where was my mistakes. My geometry cuts off at the top. Meaning it is half a node along the top.

%Under slant RIGHT SIDE for i= (.6*n^2)+1:(n*n)

if (mod(i,n)==1+s); A(i,i-1)=1; A(i,i+1)=1; A(i,i)=((h*sqrt(2))/k)-2; g(i)=((h*sqrt(2))/k)*Tinf;

%BOTTOMROW!!! % Last line elseif (mod(i,n)==0) A(i,i-1)= 1; A(i,i)=-3; A(i,i-n)=1; A(i,i+n)=1; g(i)=0; s=s+1;

%last column elseif (i==((n*n)-.4*n)+1) A(i,i-1)= 1; A(i,i)=-3; A(i,i-n)=1; A(i,i+n)=1; g(i)=0; %bottom right corner(n^2) elseif (i==n*n) A(i,i-1)= 1; A(i,i)=-2; A(i,i-n)=1; g(i)=0;

%Right side under slant %non-gen in between gen and slant else A(i,i+1)=1; A(i,i-n)=1; A(i,i+n)=1; A(i,i-1)=1; A(i,i)=-4; g(i)=0;

end end

T=A\g'; T( ~any(T,2), : ) = []; %rows

a = T == 10; T(a) = NaN;

T2= abs(real(T));

Temp = vec2mat(T2,n);

Temp1=diag(((.6*n^2)+1),0); surf(Temp)

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