Questions tagged [opencascade]
The opencascade tag has no usage guidance.
32
questions
3
votes
2
answers
143
views
Fill ParametricPlot3D into 3D solid shape
i have data point and transform it with matrix and plot with ParametricPlot3D and look like this
my goals is to fill this and get the centroid with ...
- 135
4
votes
1
answer
86
views
ToElementMesh with OpenCascadeShape returns incomplete region
I am solving a PDE using the NDSolve over a cylinder (length L=0.03 m and radius r=0.0025 m). I define the cylinder using OpeCascadeLink and the mesh as shown below. The problem is, the output of the ...
- 85
2
votes
1
answer
129
views
Meshing problem using OpenCascadeLink
I have encountered a meshing problem and I am a bit stuck with it. I tried to replicate the problem while removing most of the original code to be more concise.
I am using OpenCascadeLink to perform ...
- 45
3
votes
3
answers
173
views
How to discretize space polygon with hole?
When we using Polygon[{p1, p2, ..., pn} -> {q1, q2, ..., qn}] to draw a space polygon with hole, it seems that ...
- 410
0
votes
1
answer
115
views
How to generate a random point inside this region/discretize it?
Consider the following region:
...
- 4,984
3
votes
2
answers
210
views
BoundaryMeshRegion Error: Boundary surface is not closed
I am trying to create a BoundaryMeshRegion comprised of many cubes with random locations, in a relatively small region.
I have had success implementing my technique for a smaller number of cubes (say,...
- 363
4
votes
1
answer
87
views
Package AceFEM error: cannot be automatically installed
I have a problem to perform the package AceFEM in Mathematica 12.0.0.0 for Mac (software: macOS Monterey Version 12.4 | processor: 1,8 GHz Dual-Core Intel Core i5). I downloaded the newest AceGen and ...
- 95
5
votes
1
answer
123
views
3D Mesh refinement near sphere boundary and on surface revolutions
I am trying to solve an advection-diffusion problem inside surface of revolutions. I have high velocity gradients near the boundary of the bounding surface. Is there a way to refine the mesh near the ...
- 85
8
votes
3
answers
474
views
10
votes
2
answers
887
views
How can I generate a Swiss-Cheese type region and render it transparent?
I am trying to visualize a percolation model that is equivalent to a swiss-cheese where the holes are conducting. At some point, the size of the holes gets large enough for them to touch and a ...
- 101
7
votes
5
answers
565
views
How to graph a solid common to multiple functions
I want to be able to graph the solid that is contained by two functions. I am graphing x^2+z^2=400 and y^2+z^2=400 and this the code I used and the graph I got:
...
- 115
9
votes
2
answers
207
views
How to do boolean operations between a large amount of regions
I want to do boolean operations between a large amount of regions.
For convenience, I consider a simplified problem.
The problem is as follows, digging out a large number of small hemispheres on the ...
- 275
6
votes
2
answers
237
views
How to create cylinder pie using `ParametricRegion`?
I'm wondering that this simple definition of a cylinder pie doesn't work
...
- 47.2k
8
votes
1
answer
286
views
How to union 3D region to calculate volume?
I have a Teapot likes:
region = RepairMesh[ExampleData[{"Geometry3D", "UtahTeapot"}, "MeshRegion"]]
I want to calculate the volume ...
- 26.1k
3
votes
1
answer
176
views
What does "TetGenTetrahedralize: Tetrahedralize returned an error, 2. mean? Also error number 1,2,3...?
regioncalc5 = ToElementMesh[regioncalc4, MeshRefinementFunction -> ff]
TetGenTetrahedralize: Tetrahedralize returned an error, 2.
- 31
2
votes
1
answer
145
views
Is there a way to SurfaceArea of each face of 3D shape separately?
Consider the following 3D shape as an example:
ClearAll[cylinder];
cylinder[r_,z_]:=Cylinder[{{r,r,0},{r,r,z}},r];
It is a cylinder whose entire ...
- 8,973
4
votes
3
answers
403
views
How to make a high resolution mesh from RegionIntersection in 3D
I want to make a high-resolution 3d model of the Reuleaux tetrahedron by using Mathematica
The Reuleaux tetrahedron is the intersection of four balls of radius s centered at the vertices of a ...
- 8,848
5
votes
3
answers
259
views
How to convert cuboid to mesh efficiently
cuboids =
Table[Cuboid @@ (pts = RandomReal[100, {2, 3}]), {i, 10000}];
Method1:
...
- 8,509
4
votes
1
answer
205
views
Export Discretized ImplicitRegion as step using OpenCascade
Following the reply by @user21 to this post on exporting a region to a step file, I tried to do the same for a Discretized ImplicitRegion, but OpenCascadeShape didn't appear to work. Is there a switch ...
- 1,381
14
votes
5
answers
2k
views
3D FEM Vector Potential
I am trying to reproduce an FEM result in a paper. Due to possible copyright I cannot show the result directly but fortunately there is a free link
An Incomplete Gauge for 3D Nodal Finite Element ...
- 231
5
votes
2
answers
244
views
How to discretize the boundary of two regions?
Problem
How to discretize a surface constructed with multiple components?
Unsuccessful attempts include combining the objects top and ...
- 1,010
2
votes
1
answer
152
views
Why FEM not giving output at the boundary
I am trying to solve simple 3D Poisson's equation of thermal conduction due to heat generation (q) in a spherical composite, where from 0 to a (inner radius) conductivity is k1 and from a to b (outer ...
- 55
6
votes
3
answers
319
views
Balanced flux in FEA using NeumanValue
I'm using NeumannValue boundary conditions for a 3d FEA using NDSolveValue. In one area I have positive flux and in another area i have negative flux. In theory these should balance out (I set the ...
- 389
7
votes
2
answers
1k
views
Cylindrical coordinates in FEM
I am trying to solve the Stokes equation for fluid flow in a 3d cylinder. All boundaries are no-slip, apart from the top boundary, which enforces flow in the x-direction.
My problem is that I can't ...
- 1,231
8
votes
3
answers
367
views
Raytracing using Regions & NSolve
I want to use geometric shapes in Mathematica to build complex shapes and use my raytracing algorithm on it. I have a working example where we can get the intersections from a combination of a ...
- 4,090
2
votes
1
answer
123
views
why on some MaxCellMeasure values, FEM gives internal 1/0 error?
V 12.1 on windows 10
When I was answering NDSolveValue taking too long I noticed the following
When I use some value for MaxCellMeasure, then FEM gives 1/0.
Why ...
- 135k
8
votes
1
answer
252
views
Define a region of revolution
My goal is to use "RegionCentroid" on a solid of revolution.
This works great for 2d regions:
...
- 792
3
votes
2
answers
354
views
What can we expect from boolean region operations?
In my recent efforts to design some 3D printable objects, I have been tempted to use relatively recent additions to the Wolfram Language such as RegionDifference ...
- 19.6k
23
votes
7
answers
733
views
How to make the boundary of a 3D region smooth?
I want to draw this region,but the surface is rough.I tried to find options to improve the surface but failed.
...
- 8,260
1
vote
2
answers
416
views
RegionDifference not working properly for a region from a printable STL file
Some time ago I created a printable STL-file with a certain software of my own and now I want to modify it with Mathematica programmatically, mainly by subtracting certain geometric objects (e.g. ...
- 151
8
votes
3
answers
259
views
Discretisation of region intersection in 3D
If I try to discretise the intersection (BoundaryDiscretizeRegion), of a shell in a cuboid, some of the regions (that are found with RegionIntersection) are lost in the discretising process. I tried ...
- 121
100
votes
17
answers
5k
views
Future enhancements for the finite element method
How should the finite element method (FEM) framework in the language be extended to be more useful?
With the release of version 12.0 all fundamental FEM solvers (linear, nonlinear, stationary, ...
- 39.1k