#### 2022. 6. 7. · Building a hybrid **mesh** in **2D**¶. In some cases, the modelling domain may require flexibility in one region and equidistant structure in another. In this short example, we demonstrate how to accomplish this for a two-dimensional **mesh** consisting of a region with regularly spaced quadrilaterals and a region with unstructured triangles. In this tutorial, we will use the **gmsh** API to generate complex meshes. We will in this tutorial learn how to make the 3D **mesh** used in the DFG 3D laminar benchmark. The first part of this tutorial can be completed with the dokken92/pygmsh docker images, as described in the pygmsh tutorial. For the second and third part of the tutorial, dolfinx .... working with **2D** closed crack, so I would like to have duplicated points in the .geo file. So I have unchecked the option "remove duplicated entities in GEO models", but it seams to exists a feature which deals with the intersection of the 1D **mesh** of the edges ("There are 4 intersections in the 1d **mesh**/**Gmsh** splits those edges and tries again")..

**Gmsh**’s CAD modeler works by using boundary representations of geometrical entities, so if we want to deﬁne a

**2D**model (i.e., surfaces) we ﬁrst need to create points and curves. So we start by clicking on ‘Point’ to add new points. 5. 1D,

**2D,**3D Meshing using GmshGmsh is a is a three-dimensional finite element

**mesh**generator developed by Christophe Geuzainevisit the website:.

**Mesh**generation Create the

**mesh**Go to Tools -> Options ->

**Mesh**, in the General tab, choose the meshing algorithms and change the element size factor, e.g. 0.5 as shown in Figure 4, then close the window.To create the

**2D mesh**for the square, on the left panel, choose Modules ->

**Mesh**->

**2D**.Figure 4:

**Mesh**generation. Export

**mesh**in MED format. . Started by upstream project.