I am just trying to plot the distance x v. Temp function below. I want it to take the x values from 0 to 0.15. Thank you!

clear all;
close all;
clc;
% Fin Configuration: A
T_s = 500;                                               % [K]                  
T_inf = 350;                                             % [K]
L = 0.2;                                                 % [m]
ST_k = 14.9;                                             % [W/m*K]
U_inf = 10;                                              % [m/s]
D = 0.002;                                               % [m]
nu = 29.4*10^-6;                                         % [m^2/s]
Pr = 0.688;                                              % no units
Re = (U_inf*D)/(nu);                                     % no units
h = ((((0.664*(Re)^(1/2))*((Pr)^(1/3)))*(ST_k))/(L));    % [W/m^2*K]
P = pi*D;                                                % [m]
A = pi*D*L;                                              % [m^2]
m = sqrt((h*P)/(ST_k*A));                                % [1/m]
x = 0:0.15;                                              % [0 to 15cm] or [0 to 0.15m]
Q = sqrt(h*P*ST_k*A)*(T_s - T_inf)*tanh(m*L);            % [W] or [J/s]
T = 6.3763*cosh(m*(L-x))+350;                            % [K]
%figure('Name','Fin A Temp. v. Length')
plot(x,T);

[David]

The plot opens but there is no graph displayed.

Answer 1

[KSSV]

Presently in your code x is a single number 0. You need to change that line.

clc; clear all ;
clear all;
close all;
clc;
% Fin Configuration: A
T_s = 500;                                               % [K]                  
T_inf = 350;                                             % [K]
L = 0.2;                                                 % [m]
ST_k = 14.9;                                             % [W/m*K]
U_inf = 10;                                              % [m/s]
D = 0.002;                                               % [m]
nu = 29.4*10^-6;                                         % [m^2/s]
Pr = 0.688;                                              % no units
Re = (U_inf*D)/(nu);                                     % no units
h = ((((0.664*(Re)^(1/2))*((Pr)^(1/3)))*(ST_k))/(L));    % [W/m^2*K]
P = pi*D;                                                % [m]
A = pi*D*L;                                              % [m^2]
m = sqrt((h*P)/(ST_k*A));                                % [1/m]
x =linspace(0,0.15);   %<-----changed here                                           % [0 to 15cm] or [0 to 0.15m]
Q = sqrt(h*P*ST_k*A)*(T_s - T_inf)*tanh(m*L);            % [W] or [J/s]
T = 6.3763*cosh(m*(L-x))+350;                            % [K]
%figure('Name','Fin A Temp. v. Length')
plot(x,T);

[David]

Oh thank you! You've been very helpful.