Customized Simscape convective heat transfer component not working

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Hello, I am trying to create a custom simscape Convective Heat Transfer component that will allow me to use a variable convective heat transfer coefficient,
I have attempted to do so using the following code, but it isn't functioning as intended (heat flow is 0 regardless of temperature difference across it).
Is there something I am missing?
Thanks
component variableConvection
% This component will use a variable heat transfer coefficient when
% calculating the convective heat transfer
inputs
heat_tr_coeff = {0, 'W/(m^2*K)'}; % S:bottom
end
nodes
A = foundation.thermal.thermal; % A:bottom
B = foundation.thermal.thermal; % B:top
end
variables
T = {0, 'K'}; % Temperature difference
Q = {0, 'W'}; % Heat flow rate
end
parameters
area = {1e-4, 'm^2' }; % Area
end
equations
T == A.T - B.T;
Q == area * heat_tr_coeff * T;
end
end

Accepted Answer

Yifeng Tang
Yifeng Tang on 27 Aug 2022
Hi Roland,
I believe you are missing one equation to define how Q is related to the heat flow through the ports.
Try adding the following code to your block
branches
Q : A.Q -> B.Q;
end

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