volume

Generate a 3-D mesh and find its volume.

Create a PDE model.

model = createpde;

Import and plot the geometry.

importGeometry(model,"BracketWithHole.stl");
pdegplot(model)

Generate a mesh and plot it.

mesh = generateMesh(model);
figure
pdemesh(model)

Compute the volume of the entire mesh.

mv = volume(mesh)

mv = 
8.0244e-04

Generate a 3-D mesh and find the volume of each element.

Create a PDE model.

model = createpde;

Import and plot the geometry.

importGeometry(model,"BracketWithHole.stl");
pdegplot(model)

Generate a mesh and plot it.

mesh = generateMesh(model);
figure
pdemesh(model)

Compute the volume of the entire mesh and the volume of each individual element of the mesh. Display the volumes of the first 5 elements.

[va,vi] = volume(mesh);
vi(1:5)

ans = 1×5
10-6 ×

    0.3801    0.4653    0.1624    0.4345    0.1729

Find the combined volume of a group of elements of a 3-D mesh.

Create a PDE model.

model = createpde;

Import and plot the geometry.

importGeometry(model,"BracketWithHole.stl");
pdegplot(model)

Generate a mesh and plot it.

mesh = generateMesh(model);
figure
pdemesh(model)

Evaluate the shape quality of the mesh elements and find the elements with the quality values less than 0.5.

Q = meshQuality(mesh);
elemIDs = find(Q < 0.5);

Compute the total volume of these elements.

mv05 = volume(mesh,elemIDs)

mv05 = 
1.4865e-07

Find how much of the total mesh volume belongs to these elements. Return the result as a percentage.

mv05_percent = mv05/volume(mesh)*100

mv05_percent = 
0.0185