Creating solid geometry with PDE

Question

sevgi 2024-3-9

回答： Yatharth 2024-3-18

Hello there;

For thermal analysis, I need to create the solid model shown in the attached image with PDE. Coul you help me create the geometry with PDE?

Note: the circles are empty

Answer 1

Yatharth 2024-3-18

Hi Sevgi,

For creating a solid model shown in the image you attached you can use Matlab 3-D shape and "subtract" function.

Note: It can only be done on MATLAB R2023B release

Here is an example for you:

% Define the start and end points

xStart = -13;

xEnd = 13;

% Number of cylinders to create

numCylinders = 5;

% Calculate the spacing between each cylinder

spacing = (xEnd - xStart) / (numCylinders - 1);

% Initialize an array to hold the Cylinder objects

cylinders = cell(1, numCylinders);

% Loop to create each Cylinder and set its center

for i = 1:numCylinders

xCenter = xStart + (i-1) * spacing;

cylinders{i} = shape.Cylinder("Radius", 1, "Height", 10, ...

"Color", [0.9290, 0.6940, 0.1250], ...

"Center", [xCenter, 0, 0]);

end

box = shape.Box("Height",10 ,"Length",30,"Color","r","Width",10);

show(box)

for i = 1:numCylinders

box = subtract(box, cylinders{i});

end

show(box)

Now you can use this shape and apply other techniques such as triangulation, generate STL file.

Some of the resources that might help you.

"customAntenna" object lets you create an antenna from a custom shape. https://www.mathworks.com/help/antenna/ref/customantenna.html
"stlwrite" function writes the points and connectivity list of an antenna or array mesh to a STL file of specified name. https://www.mathworks.com/help/antenna/ref/stlwrite.html
"subtract" function for Boolean subtraction operation on two shapes https://www.mathworks.com/help/antenna/ref/subtract.html