UA-33602782-1
Tips & Tricks: Size Controls in ANSYS
Dec07

Tips & Tricks: Size Controls in ANSYS

In our previous post we discussed the importance of geometry preparation, utilising the ANSYS Global Mesh Control settings and the best use of the ANSYS Meshing Advanced Size Functions.  We will now focus on the ability to target specific areas of the mesh for additional refinement and mesh control, which is recommended for intermediate to advanced users.   By using these explicit sizing controls, the resolution of the geometry can be accurately captured and we can ensure that we accurately resolve any high gradient areas in the flow, such as a wake or separation/recirculation zones.   As you would expect, in addition to the automated settings, ANSYS Meshing provides users with as much additional control as they desire: with the option to specify combinations of point controls, edge controls, surface controls and/or body controls.  Each one of these has its own options and can be used to influence the mesh in different ways.   Point controls can be used to control the mesh based on a sphere of influence, whereby any region of the mesh that is contained within the sphere will be given the chosen sizing.  An example of this is shown below.   Point Sizing (using Sphere of Influence)   Edge Sizing Controls can be given to any edge and allow for different types of bias control, whereby the mesh size varies along the edge.  In the image below, we have applied an edge sizing to a single edge.   Basic Edge Sizing The edge sizing feature can use either a specified element size, a number of divisions along the edge or can be controlled by a sphere of influence.  This last option will refine along the edge only where it is intersected by the sphere of influence, and we will show this later on in this blog post.   Within the edge sizing function, you have the ability to set a local growth rate for all cells that grow away from this edge (overriding the global growth rate).  There are also useful options for Edge Bias control, which allows you to define how the mesh is distributed along the length of the edge.  For example, you can force the mesh along the edge to vary from large to small, small to large; or more complicated bias such as large to small in the middle then back to large, or small to large in the middle and then back to small again at the other end of the edge.   So it is clear that there are quite a few options available to control edge meshing, and since it is such an easy tool to use, we'd suggest that you simply have a...

Read More
UA-33602782-1