README.md

EasyGmsh

Overview

EasyGmsh is developed to help you generate finite element mesh with Gmsh easily.

Install

(TODO)

Basic Usage

Only reactangular mesh is supported till now.

RectMesh

You can easily generate a structured rectangular mesh using RectMesh.

Click here to read the example

# Generate coarse mesh for TWIGL benchmark
import gmsh
import numpy as np
from EasyGmsh import RectMesh

"""
Material Configuration:

80  | ----------------- |
    y   3  |  3  |  3   |
56  | ----------------- |
    |   2  |  1  |  3   |
24  | ----------------- |
    |   3  |  2  |  3   |
 0  |________ x ________|
    0      24    56    80

Material ID & Name:
1: TWIGL-MAT1
2: TWIGL-MAT2
3: TWIGL-MAT3
"""

gmsh.initialize()

# Describe the mesh structure
nodes = np.array([0., 24., 56., 80.])
material_names = np.array(["TWIGL-MAT1", "TWIGL-MAT2", "TWIGL-MAT3"])
materials = np.array([
    [3, 3, 3],
    [2, 1, 3],
    [3, 2, 3]
]) # material id starts at 1 but not 0

# Create RectMesh
twigl_mesh = RectMesh(
    lx = nodes,
    ly = nodes,
    material_names = material_names,
    materials = materials
)
twigl_mesh.generate(mesh_size = MESH_LEVEL)
twigl_mesh.export_assembly_materials(path = "./input/assembly_info.txt")

# Generate mesh using Gmsh
gmsh.model.geo.synchronize()
gmsh.model.mesh.generate(dim=2)
gmsh.write("input/mesh.msh")
gmsh.fltk.run()
gmsh.finalize()

Version: 0.1
Written by LI Zikang, Mar. 2024.
Latest Edit in Mar. 2024.