making a 3d contour
显示 更早的评论
采纳的回答
pr = 0.734;
n = 1.413e-5;
ts = 12;
l = 10;
w = 4;
k =0.02428;
V = 10:2:50;
To = 0:10;
for iv = 1:numel(V)
v = V(iv);
re = (v * 0.277778 * l) / n;
nu = (0.037 * re^0.8 - 871) * pr^0.333333;
h = (nu*k) / l;
%fprintf("\n\n(velocity : %f(km/h) )\t",v);
%fprintf(" (rynold : %f)\t",re);
%fprintf("(nusselt : %f)\t",nu);
%fprintf(" (h : %f(w/m^2*k))\n",h);
for ito = 1:numel(To)
to = To(ito);
if ts > to
q(iv,ito) = h * l * w * (ts-to);
else
q(iv,ito) = h * l * w * (to-ts);
end
%fprintf("\t\t\tthe heat loss from surface is : %f\n", q);
end
end
[V To] = ndgrid(V,To);
contourf(V,To,q)
surfc(V,To,q)
colorbar
or maybe
n = 1.413e-5;
ts = 12;
l = 10;
w = 4;
k = 0.02428;
v = (10:2:50).';
to = 0:10;
re = (v * 0.277778 * l) / n;
nu = (0.037 * re.^0.8 - 871) * pr^0.333333;
h = (nu*k) / l;
q = h .* l .* w .* abs(ts-to);
[V To] = ndgrid(v,to);
contourf(V,To,q)
surfc(V,To,q)
colorbar
2 个评论
VBBV
2022-12-16
It seems OP wants 3D contour. Perhaps surfc may be good option instead
Karim Ayman
2022-12-16
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