2D Mesh Manipulation
Abstract
Unstructured methods for region discretization have become common in computational fluid dynamics (CFD) analysis because of certain benefits they have over structured meshes (where the discretization of the domain reflects some type of consistent geometrical regularity). Unstructured meshes are powerful tools for efficiently defining complex geometries and also lend themselves to analysis techniques such as adaptive mesh refinement (AMR) where the properties of the mesh adapt to the properties of the flow that is being analyzed. They also are useful for adapting a mesh to a geometry that is being optimized to exhibit desired characteristics. As unstructured methods have grown in popularity, mesh manipulation techniques that have traditionally been reserved for structured meshes have started migrating to the world of unstructured meshing as well. One such technique is the application of Winslow elliptic smoothing equations to unstructured meshes. It has been shown that it is not necessary for the computational space of the entire mesh to be constructed as an overarching system; rather, each node in computational space can be treated as an individual virtual control volume. This allows Winslow equations to be utilized even if the original physical mesh is of low quality. Traditional Winslow equations have been shown to be ideal for smoothing nonboundary nodes in inviscid regions but are of limited use in other situations. Modifications to the implementation of the computational space allow Winslow equations to be extended so that they can also be applied to boundary nodes and to highly anisotropic viscous regions of unstructured meshes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2011
- Accession Number
- ADA552804
Entities
People
- James S. Masters
Organizations
- Arnold Engineering Development Complex