GUI Work with plotting time v temp

Question

kileigh palmer 2020-12-6

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/680488-gui-work-with-plotting-time-v-temp

评论： VBBV 2020-12-8

Hello lovely people!

I am attempting to create a code that plots Temperature vs time, the first bit of code on (a) is me doing the math for 50 and 140 temperature. After that is loop where I define the density and viscocity at different temperatures, but it won't do the equation like I wanted to. Any suggestions?

%% GUI #2
volume = 0.0125 % in ft3
D = 0.73/12 % in ft
density = 1.94 % at 50 F
den = 1.91 % at 140 F
vi = 2.73*(10^-5) % for 50 F
visc = 0.974*(10^-5) % for 140 F
 
Vel50 = (2100*vi)/(density*D) % ans in ft/s % velocity at 50 F
Vel140 = (2100*visc)/(den*D)
 
t = (4*volume)/(pi*(D^2)*Vel50) % ans in seconds time at 50 F
t140 = (4*volume)/(pi*(D^2)*Vel140) % ans in seconds
 
% B
Vel5 = (4000*vi)/(density*D) % ans in ft/s
Vel14 = (4000*visc)/(den*D)
 
t = (4*volume)/(pi*(D^2)*Vel5) % ans in seconds
t140 = (4*volume)/(pi*(D^2)*Vel14) % ans in seconds
 
 
% Graph at various water temperatures
dens = [1.940 1.938 1.931 1.908 1.869]; % different densities at temps from chart in book
for k = 1:numel(dens)
    if dens == 1.940
      vi = 3.732*(10^-5)
      disp('Temperature of water is 32 F')
      T = 32;
    elseif dens == 1.938
        vi = 2.344*(10^-5)
        disp('Temperature of water is 60 F')
        T = 60;
    elseif dens == 1.931
        vi = 1.5*(10^-5)
        disp('Temperature of water is 90 F')
        T = 90;
    elseif dens == 1.908
        vi = 9.743*(10^-6)
        disp('Temperature of water is 140 F')
        T = 140;
    elseif dens == 1.869
        vi = 6.342*(10^-6)
        disp('Temperature of water is 200 F')
        T = 200;
    end
    Vel(k) = (2100*vi)/(dens*D)
end
 
for j = 1:numel(Vel)
    tk = (4*volume)/(pi*(D^2)*Vel)
end
 
Tf = [32 60 90 140 200]
plot(Tf,Vel)

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Answer 1

VBBV 2020-12-6

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/680488-gui-work-with-plotting-time-v-temp#answer_566628

在 MATLAB Online 中打开

You can change the for loop structure to below and plot time vs emp

for k = 1:numel(dens)
    if dens(k) == 1.940
      vi = 3.732*(10^-5)
      disp('Temperature of water is 32 F')
      T(k) = 32;
      Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.938
        vi = 2.344*(10^-5)
        disp('Temperature of water is 60 F')
        T(k) = 60;
       Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.931
        vi = 1.5*(10^-5)
        disp('Temperature of water is 90 F')
        T(k) = 90;
       Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.908
        vi = 9.743*(10^-6)
        disp('Temperature of water is 140 F')
        T(k) = 140;
        Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.869
        vi = 6.342*(10^-6)
        disp('Temperature of water is 200 F')
        T(k) = 200;
        Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    end    
end
plot(T,Vel,'-b',tk,T,'-r.')
legend('Temp vs Vel','Time vs Temp')

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kileigh palmer 2020-12-6

在 MATLAB Online 中打开

When I put that loop into the matlab it worked, but when I did it in the GUI app, it only showed values at T = 32, I attached my modified GUI code below, as well as what the graph is popping up as.

function DiameterinEditFieldValueChanged(app, event)
            D = app.DiameterinEditField.Value/12; % Diameter in ft
           
volume = app.Volumeft3EditField.Value;
% Graph at various water temperatures
dens = [1.940 1.938 1.931 1.908 1.869];
for k = 1:numel(dens)
    if dens(k) == 1.940
      vi = 3.732*(10^-5)
      disp('Temperature of water is 32 F')
      T(k) = 32;
      Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.938
        vi = 2.344*(10^-5)
        disp('Temperature of water is 60 F')
        T(k) = 60;
       Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.931
        vi = 1.5*(10^-5)
        disp('Temperature of water is 90 F')
        T(k) = 90;
       Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.908
        vi = 9.743*(10^-6)
        disp('Temperature of water is 140 F')
        T(k) = 140;
        Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    elseif dens(k) == 1.869
        vi = 6.342*(10^-6)
        disp('Temperature of water is 200 F')
        T(k) = 200;
        Vel(k) = (2100*vi)/(dens(k)*D)
       tk(k) = (4*volume)/(pi*(D^2)*Vel(k))
    end    
end
for k = 1:numel(dens)
    if dens(k) == 1.940
      vi = 3.732*(10^-5)
      disp('Temperature of water is 32 F')
      T(k) = 32;
      Velo(k) = (4000*vi)/(dens(k)*D)
       tkt(k) = (4*volume)/(pi*(D^2)*Velo(k))
    elseif dens(k) == 1.938
        vi = 2.344*(10^-5)
        disp('Temperature of water is 60 F')
        T(k) = 60;
       Velo(k) = (4000*vi)/(dens(k)*D)
       tkt(k) = (4*volume)/(pi*(D^2)*Velo(k))
    elseif dens(k) == 1.931
        vi = 1.5*(10^-5)
        disp('Temperature of water is 90 F')
        T(k) = 90;
       Velo(k) = (4000*vi)/(dens(k)*D)
       tkt(k) = (4*volume)/(pi*(D^2)*Velo(k))
    elseif dens(k) == 1.908
        vi = 9.743*(10^-6)
        disp('Temperature of water is 140 F')
        T(k) = 140;
        Velo(k) = (4000*vi)/(dens(k)*D)
       tkt(k) = (4*volume)/(pi*(D^2)*Velo(k))
    elseif dens(k) == 1.869
        vi = 6.342*(10^-6)
        disp('Temperature of water is 200 F')
        T(k) = 200;
        Velo(k) = (4000*vi)/(dens(k)*D)
       tkt(k) = (4*volume)/(pi*(D^2)*Velo(k))
    end    
end
plot(app.UIAxes,tk,T,'-r.',tkt,T,'-b.')
legend(app.UIAxes,'Time vs Temp: Laminar', 'Time vs Temp: Turbulent')
        end