I'm stuck at plotting the solution to the diffusion equation. For the provided c and D, what would be optimal time and distance values?
x = 0:0.01:10^5;t = [100 200 300];c = 10^(-6); D = 10^(-9); figure(1)x0 = [0 0 10^10];u0 = [c 0 0];plot(x0, u0)hold onfor i = 1:3 dn = 2*D*sqrt(t(i)); e2 = erf( -x/dn ); u(i,:) = c*(1 + e2); plot(x,u(i,:))endgrid onylabel('Concentration (C) (mols/metres^{3})')xlabel('Distance (x) (metres)')legend('t = 0',['t = ' num2str(t(1))],['t = ' num2str(t(2))], ... ['t = ' num2str(t(3))])
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