Questions tagged [gmsh]
60 questions
2
votes
2 answers
How to load and inspect a gmsh mesh (*.msh file)
I want to programmatically inspect *.msh files (get a number of nodes and elements, possibly also edges and faces). How can I do this with either gmsh or pygmsh module? All tutorials I have found so far focus mostly on mesh generation. I can not…
abukaj
- 2,582
- 1
- 22
- 45
2
votes
1 answer
python - Can't use gmsh after installing via pip and conda
I installed gmsh but I can not use it in spyder.
I used the following:
pip install gmsh
conda install -c conda-forge gmsh
but when I run the following code:
import gmsh
gmsh.initialize()
I get the following error:
No module named 'gmsh'
I'm using…
Maryam Jalili
- 53
- 6
2
votes
1 answer
How to extract the normal vectors at the boundary nodes in gmsh?
I have a geo file for gmsh and mesh it. Then I would like to extract the normal vectors at the nodes of a selected surface. How is this possible?
Below is my gmsh geo file.
//Construct a cube in GMSH
//Build a line
Point(1) = {0, 0, 0,…
Marc Frei
- 21
- 2
1
vote
1 answer
Combine two extruded volumes where one has a hole
I have tried to combine two volumes where one has a cylindrical hole. Both volumes were extruded from a surface. I'm using pygmsh and the code looks like this:
import pygmsh
L = 3
W = 3
c1 = [W/2, L/2, 0]
r = 0.075
resolution1 = 0.11
resolution2…
Bodo Lipp
- 21
- 3
1
vote
0 answers
Extrude profile along path in GMSH
I have this gmsh script to create a spiral and a cross-sectional profile:
SetFactory("OpenCASCADE");
// Profile Dimensions
l = 0.005;
angle = 5;
dx = Atan(angle*Pi/180)*l;
// Mesh
Point(1) = {-l/2, -l/2, 0, 1.0};
Point(2) = {l/2, -l/2, 0,…
user20995624
1
vote
0 answers
Is there a python GMSH function that can transform a 2.2 .msh file to a 4.1 .msh file?
Because of the software used in my project, I would need to 'translate' a GMSH .msh file generated in version 2.2 into a version 4.1 .msh file using the Python GMSH library.
I tried merging the 2.2 msh file into a gmsh model, then setting the…
Kajitrim
- 19
- 4
1
vote
1 answer
Gmsh structured mesh (Hexahedron mesh) gets imported in unstructured way (tetrahedron) into Itasca PFC software using Fipy
I'm trying to import a 3D cylindrical CFD mesh into Itasca PFC7-3D software from Gmsh using Fipy. The mesh created in Gmsh environment is fully structured(hexahedron cells). However when I tried to import the mesh into Itasca I realized it is…
HadiMorovvatju
- 13
- 4
1
vote
1 answer
Why Gmsh create more surfaces than expected when I use "gmhs.model.occ.cut()" command?
I am trying to create a volume in Gmsh (using Python API) by cutting some small cylinders from a bigger one.
When I do that, I expect to have one surface for each cutted region, instead, I get the result in the figure. I have highlighted in red the…
Rbocce
- 15
- 3
1
vote
1 answer
Finite Element Analysis with Gridap.jl; how to define external forces?
I'm following this tutorial in order to try and do an FEA of a model.msh that I have to see how it would deform given different external forces in different places.
There they define the weak form as
a(u,v) = ∫( ε(v) ⊙ (σ∘ε(u)) )*dΩ
l(v) = 0
and…
guin0x
- 337
- 2
- 10
1
vote
1 answer
How can I optimize mesh in gmsh? (for the intersection between entities)
I have a geometry composed of four walls, a slab, and beams.
geometry image:
I am using gmsh for meshing it, starting from a step file. I would like to know how to guarantee the continuity between elements in the area of the next figure. I am using…
Marialaura Leonardi
- 11
- 2
1
vote
1 answer
ubuntu linux gmsh gives "sh: 1: python: not found" error
I try to run a Gmsh python script from the command line (or from PyCharm or Spyder)
gmsh script.py
but I get the following error:
sh: 1: python: not found
also in the Gmsh console there is this error:
Done - 1 error : Abnormal server termination…
OlM
- 47
- 5
1
vote
1 answer
How to make a diffusion from the center of the circle to the edge on gmsh? [python]
I am trying to simulate the diffusion of a nutrient in a tumor as a function of space and time on python using the gmsh tool. So I need the initial concentration to be in the center, then diffusivity to spread it outward.
Here is the complete code,…
Tiffany Overdick
- 11
- 1
1
vote
1 answer
Problem when importing a mesh with Gmsh3D in Fipy
I am trying to import to Fipy a 3D mesh previously generated with Gmsh using the Gmsh3D function, like this:
mesh = Gmsh3D(join(output,'case_1.msh'),communicator=serialComm)
I get the same error as other similar posts, but the proposed solutions do…
Eric Planas
- 13
- 3
1
vote
3 answers
How to ensure node points in gmsh?
I am trying to build a quite simple mesh. I have a box:
box_size = 50;
lb = 10.;
Point(1) = {-box_size/2, -box_size/2, -box_size/2, lb};
Point(2) = {box_size/2, -box_size/2, -box_size/2, lb};
Point(3) = {box_size/2, box_size/2, -box_size/2,…
Julius
- 735
- 2
- 6
- 17
0
votes
0 answers
pygmsh mesh from paths with orientations
I'd like to take multiple paths, and using pygmsh, convert them using their orientations to a mesh. I'm testing with these paths:
path1 = [[-2, 0], [-2, 2], [2, 2], [2, 0], [-2, 0]]
path2 = [[-1.5,0.5], [1.5,0.5], [1.5,1.5], [-1.5,1.5],…
