PIPE CYLINDER PLAXIS 2D FREE

The convert operation introduces triangular elements on the boundaries of the coil. The operation is designed to split the elements touching the boundaries such that triangular face elements are created. Thus, we must first add a Convert feature to the mesh sequence and apply it to the surfaces between the coil and its surroundings. A volume that is to be meshed with tetrahedral elements can only have triangular surface elements on all of its boundaries. This surrounding volume is amenable to only tetrahedral meshing, not swept meshing. We do, however, still need a volumetric mesh of the surroundings. As such, we can begin with a triangular surface mesh at one end and then sweep it along the entire length of the coil to create triangular prismatic elements.ДЄ triangular mesh (represented in blue) is applied to the cross-sectional surface at one end of the coil and then swept along the entire length. The coil is long and uniform in cross section. YouвЂ™ve probably already recognized that the coil itself is an excellent candidate for swept meshing.

PIPE CYLINDER PLAXIS 2D FREE

The default Free Tetrahedral mesh feature is applied to the entire model. The geometry for such a model and the default mesh might look like the image below.ДЄ coil surrounding a magnetic core in an air domain. If tasked with computing the inductance, we would also need to consider the surrounding air and the magnetic core materials. This coil consists of a long wire with quite gradual bends. Image by Spinningspark, via Wikimedia Commons. Shifting gears, letвЂ™s now consider an inductive coil similar to the one pictured below.ДЄn inductive coil. Our Second Example: A Coil and Its Surroundings Our Flow Through a Pipe Elbow tutorial is one example in which this swept meshing technique is used. The combination of a tetrahedral and swept mesh with the boundary layers applied at the walls.ДЇrom the above images, we can observe that the swept mesh can significantly reduce the size of the model for this fluid flow problem. The last step of the meshing sequence is to apply the Boundary Layers mesh feature. We can now apply a tetrahedral mesh to nest the two bent sections and sweep the remaining straight sections. The swept mesh along the straight sections also has a nonuniform element distribution. Since we anticipate that the flow will vary gradually along the length, the elements can be quite stretched in the axial direction. It is also possible to specify a Distribution subfeature to the Swept feature to explicitly control the element distribution and set up a nonuniform element size along the length. Note that the Boundary Layers mesh feature is not yet applied.ДЄ tetrahedral mesh is applied to only one of the domains.ДЇrom this one meshed domain, we can now use the Swept mesh functionality in the straight sections, as illustrated below. This mesh should only be applied to one of the domains along the length of the pipe a domain that represents a bend (depicted below). Once the geometry is partitioned, we can apply a Free Tetrahedral mesh feature. The pipe domain is partitioned into several subdomains, which are shown in different colors. We can exploit this foreknowledge of the solution to partition the geometry into various domains. Meanwhile, the variation of the velocity along the cross section and around the bends will be significant. The default finite element mesh for this fluid flow problem includes a boundary layer mesh on all no-slip boundaries.ДЄn experienced fluid flow analyst would immediately recognize that the flow field in the long, straight sections will be primarily parallel to the pipe and vary quite gradually along the axis. Note that the boundary layer mesh is applied to the pipe walls and that the mesh is otherwise quite uniform in size within the long, straight sections of the pipe. If you go ahead and mesh this geometry with just the default Physics-Controlled Mesh capability, you will obtain a mesh like that pictured below. The geometry for a fluid flow model of just one pipe in this network might look like the image below.ДЄ CAD model of a pipe volume for fluid flow analysis. Image by HervГ© Cozanet, via Wikimedia Commons. You can see that there are many bends with long straight sections in between.ДЄ piping network. Suppose you are tasked with computing the fluid flow through a network of pipes, as depicted below. Here, we will look at using swept meshing to generate efficient and accurate finite element meshes in the context of some common modeling cases. You want to have a mesh that will accurately represent the geometry and the solution, but you do not want too many elements, as solving your models would then require excessive computational resources. Modeling geometries with high aspect ratios can be one of the more challenging tasks for the finite element analyst.

Pipe cylinder plaxis 2d