How can I create a script that solves a function for temperatures over a length?

1 次查看(过去 30 天)
Below is the function code, followed by the script and obtained error. I'm looking to create a script that generates a vector for 'Ts' and 'Tg' that contains different temperatures along a given z length (say 0 - 0.42m). This ideally would be kept in a function code as this will be built on to give concentration profiles using rate of rxn equations which depend on temperature values.
FUNCTION CODE:
function temp = temperature(z, T)
Ts = T(1);
Tg = T(2);
% temperature profiles
Ts1 = ((-3508440.83).*(z.^5))+((3221859.34).*(z.^4))-((1089760.82).*(z.^3))+((165361.13).*(z.^2))-((12015.96).*z)+(1179.21);
Ts2 = ((-1906981.2).*(z.^3))+((2073664.15).*(z.^2))-((754331.65).*(z))+(92096.47);
Tg1 = ((2796881.8).*(z.^5))-((2553240.18).*(z.^4))+((852324.51).*(z.^3))-((124780.34).*(z.^2))+((6092.92).*(z))+(889.33);
Tg2 = ((-1567143.11).*(z.^3))+((1751141.7).*(z.^2))-((653704.46).*(z))+(81812.04);
% Solid Temperature Loop
if z >=0 && z<=0.32
Ts = Ts1;
elseif z<=0.407
Ts = Ts2;
end
% Gas Temperature Loop
if z >=0 && z<=0.32
Tg = Tg1;
elseif z<=0.407
Tg = Tg2;
end
temp = [Ts, Tg];
end
SCRIPT
z0 = [0 0.415];
T0 = [0 0];
temp = feval(@temperature,z0,T0);
Ts = temp(1)
Tg = temp(2)
ERROR obtained:
Operands to the logical and (&&) and or (||) operators must be convertible to logical scalar values.
Error in temperature (line 13)
if z >=0 && z<=0.32
Error in Tempprofile (line 4)
temp = feval(@temperature,z0,T0);

回答(1 个)

Torsten
Torsten 2022-4-19
编辑:Torsten 2022-4-19
z is a vector.
If you use short-circuit AND (&&) , each expression in the if condition must evaluate to a scalar. This is not the case here. So using && will result in an error.
By the way:
What do you want to test with
if z>= 0 && z <=0.32
for z being a vector ?
  5 个评论
Torsten
Torsten 2022-4-20
编辑:Torsten 2022-4-20
z0 = [0 0.415];
[Ts,Tg] = feval(@temperature,z0);
Ts
Tg
function [Ts,Tg] = temperature(z)
Ts = zeros(size(z));
Tg = zeros(size(z));
idx1 = z>=0 & z <=0.32;
idx2 = z>0.32;
z1 = z(idx1);
z2 = z(idx2);
Ts1 = ((-3508440.83).*(z1.^5))+((3221859.34).*(z1.^4))-((1089760.82).*(z1.^3))+((165361.13).*(z1.^2))-((12015.96).*z1)+(1179.21);
Ts2 = ((-1906981.2).*(z2.^3))+((2073664.15).*(z2.^2))-((754331.65).*(z2))+(92096.47);
Tg1 = ((2796881.8).*(z1.^5))-((2553240.18).*(z1.^4))+((852324.51).*(z1.^3))-((124780.34).*(z1.^2))+((6092.92).*(z1))+(889.33);
Tg2 = ((-1567143.11).*(z2.^3))+((1751141.7).*(z2.^2))-((653704.46).*(z2))+(81812.04);
Ts(idx1) = Ts1;
Ts(idx2) = Ts2;
Tg(idx1) = Tg1;
Tg(idx2) = Tg2;
end

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Programming 的更多信息

产品


版本

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by