i have a txt file with 'temp' and 'heat flux' and i need to use it to calculate final temp and optimum emissivity. my code runs fine but the output file is coming out blank?
10 views (last 30 days)
Show older comments
C1 = 3.74177e8;
C2 = 1.43878e4;
sig = 5.67e-8;
T_static = 229.58;
Tval = fopen('radiative boundary.txt', 'r');
Tvalue = fscanf(Tval, '%f');
fclose(Tval);
T = Tvalue;
H = hvalue;
Temp_value = [];
optimum_emsvty = [];
Temp_value = Temp_value;
optimum_emsvty = optimum_emsvty;
for i = 1:length(H)
e0 = 0.0;
e1 = 1.0;
delt = 1;
while abs(delt) > 0.000001
e = (e0 + e1) / 2.0;
c = 500;
for j = 1:5
c = c - wall(c, i, T, H, e, sig, T_static) / derivative(@wall, c, 1e-6, i, T, H, e, sig, T_static);
end
powr = integral(@(lam) power(lam, C1, C2, e), 8, 12);
delt = powr - integral(@(lam) power(lam, C1, C2, 1), 8, 12);
if delt > 0
e1 = e;
elseif delt < 0
e0 = e;
end
end
c = double(c);
end
writematrix(optimum_emsvty,'Optimum_Emissivity.txt');
writematrix(Temp_value,'Final_Wall_Temperature.txt');
function powr = power(lam, C1, C2, e)
powr = (e * C1) / ((lam^5) * (exp(C2 / (lam * T_static)) - 1));
end
6 Comments
Tony
on 5 Jun 2024
You'll have to ask that student, or the supervisor, what Temp_value and optimum_emsvty are supposed to do/mean. If you're lucky, they've written the calculations somewhere. Otherwise, you'll have to figure out the lines of code yourself.
Answers (0)
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!