adaptive mesh refinement for 3d shapes
22 ビュー (過去 30 日間)
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Hello,
I imported a 3d stl shape in matlab and i would like to refine a mesh of a part of my domain with a defined x ,y , z.....as i know it isn't possible for 3d shapes but If anyone has an opinion, I would appreciate it.
this is my code i like to have a Hmax=1um for my region and Hmax=8um for other parts...but up to now i can just plot my region and can't define adaptive mesh for it.
"clc;
clear;
model = createpde;
gmbearing = importGeometry(model, "s2my_alpha_shape1000.stl");
mesh=generateMesh(model,"Hmax",8e-6,"GeometricOrder","quadratic");
% Obtain node coordinates and tetrahedral connectivity
nodes = mesh.Nodes;
tets = mesh.Elements;
fig1=figure(1);
pdegplot(gmbearing,"CellLabels","on","FaceAlpha",0.2,"FaceLabels","on")
title('Geometry');
xlabel('x-coordinate')
ylabel('y-coordinate')
zlabel('z-coordinate')
figure(2);
pdeplot3D(model);
title('Mesh Visualization');
%%
elemIDs=findElements(mesh,"box",[-0.12e-3 0.12e-3],[-0.45e-3 0.45e-3],[0 1e-5]);
figure(3)
pdemesh(model)
hold on
pdemesh(mesh.Nodes,mesh.Elements(:,elemIDs),"EdgeColor","red")"
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回答 (1 件)
Yatharth
2024 年 1 月 5 日
Hi Saeed,
I understand that you are facing an issue with creating an adaptive mesh for a 3D STL geometry in MATLAB, specifically refining a mesh in a localized region to a smaller element size.
Looking at your code I can see you are using “Hmax” in “generateMesh” function to have a target maximum element size. Looking at your workflow you can use “refinemesh” function to refine the mesh in a specific region after generating an initial coarse mesh. Here is the link to the documentation of the function. https://www.mathworks.com/help/pde/ug/refinemesh.html
You can also look into the following function “geometryFromMesh” to create geometry within the model. Here is the documentation for the same. https://www.mathworks.com/help/pde/ug/pde.pdemodel.geometryfrommesh.html
I hope this helps.
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