Display generated mesh/ call out adjacent nodes in 3D domain

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Shreya George 2021-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/745992-display-generated-mesh-call-out-adjacent-nodes-in-3d-domain

评论： Shreya George 2021-2-16

I have generated a 3D domain and meshed it using generateMesh() command. Is there a way to display the generated mesh? I need the indices of the nodes immediately below the the top surface of the domain. Is there a command to call these nodes directly rather than displaying the mesh and identifying each such nodes individually?

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Answer 1

Ravi Kumar 2021-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/745992-display-generated-mesh-call-out-adjacent-nodes-in-3d-domain#answer_624082

Check findNodes function. You should be able to specify region as box in which you need node IDs.

Regards,

Ravi

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Shreya George 2021-2-16

This is the command that I tried

nodes=findNodes(mesh,'box',[-5 5],[-2 2],[-0.5 0]);

But I keep getting this error message. My domain is defined with x = -5 to 5, y = -2 to 2, z = -5 to 0 .

Error using pde.FEMesh/findNodes

X and Y must define a 2-dimensional bounding box.

Also, using the box command requires specifying an arbitrary depth/ z lim. To see the nodes that are immediately below the top surface nodes, is there a way to display the nearest nodes in 3D as shown in examples in 2D?

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