in MATLAB PDE Toolbox App, I've multiple objects (Rectangular shaped) in one file. For multiple objects I'd like to specify the PDE coefficients differently. How can I specify the different PDE coefficients for different objects.
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Md Shahidul Alam
on 8 Jul 2015
Commented: Alan Weiss
on 13 Jul 2015
As an example, I have 3 rectangular shaped objects. They share the boundary with each other. I'd like to calculate the heat transfer equation for 3 different objects. The heat source,Q is different for different objects e.g Q = [10;20;30]. So using PDE Toolbox GUI, how can I set the value ?
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Accepted Answer
Alan Weiss
on 9 Jul 2015
After you have drawn your rectangles, select PDE > PDE Mode. Then double-click each rectangle to enter its coefficients.
Alan Weiss
MATLAB mathematical toolbox documentation
More Answers (1)
Md Shahidul Alam
on 9 Jul 2015
1 Comment
Alan Weiss
on 13 Jul 2015
The equation that the PDE Toolbox solves is displayed above the coefficients in the PDE Specification dialog box:
-div(K*grad(T)) = Q + h*(Text - T)
where T = temperature, k = coeff. of heat conduction, Q = heat source, h = convective heat transfer coeff., and Text = external temperature.
In the Boundary Condition dialog box, the Neumann boundary conditions are
n*k*grad(T) + q*T = g
where g = heat flux and q = heat transfer coefficient.
In summary, Q is a coefficient of the PDE, and g is a Neumann boundary condition term.
Alan Weiss
MATLAB mathematical toolbox documentation
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