Heat transfer differential equation
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Enrico Danzi
le 10 Déc 2019
Réponse apportée : Enrico Danzi
le 10 Déc 2019
Dear all,
I'm quite a new user of Matlab, I'm asking you somethiing that could be simple or obvious, but I've tried and no reasonable results came uot.
I've to calculate the Temperature evolution in time of a system affected by heat conduction and radiation, this is my equation:
and this is my attempt code:
function[yp] = f(t,y);
% defining constants
d = 0.00585;
l = 0.03325;
m = 0.009329;
v = 20;
cp = 0.5;
nu = 16.24*10^-6;
sigma = 5.6704*10^-6;
eps = 0.8;
h = (0.26*((d/nu)*v)^0.6)*(0.7^0.37);
A = 7.926*10^-4;
k1 = (h*A)/(m*cp);
k2 = (sigma*eps*A)/(m*cp);
ya = 299;
% equation
yp = k1*(y-ya)+k2*(y^4);
Then, on the command window:
[t,y] = ode45('f',[0,5],1673)
What I am doing wrong (in the problem formulation, I don't care for instance to numbers)?
Thanks for any help!
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