Pointwise Releases Webinar ‘To Improve CFD Solution Accuracy in High-Order Meshes’
FORT WORTH, TX, USA, Jan 24, 2019 – Pointwise has released the webinar, “High-Order Mesh Generation Using Pointwise.” The webinar addresses the two main challenges tied to the degree elevation of linear elements: boundary conformance and curving of high aspect ratio cells encountered within the boundary layer region and shows how to improve CFD solution accuracy by generating boundary conforming high-order meshes.
A Q2 high-order mesh was generated for the NASA Rotor 37 geometry. The primary nodes (red) and inserted nodes (blue) can be seen both for the curved surface mesh elements, as well as for a slice taken through the volume mesh.
Traditionally, adding cells to a mesh, known as H-refinement, was the primary means by which solution accuracy could be improved. The additional resolution enables the capturing of flow phenomena often diffused by coarser variations of the same mesh. Another technique used to improve spatial and temporal accuracy is by performing degree elevation, both for the assumed solution within a given element and for the element itself. In doing so, linear meshes can become curved with the addition of nodes along edges, faces, and in the interior. Fewer elements are then required to accurately represent curved geometry and capture complex flow features of interest.
There are two primary challenges associated with the degree elevation of linear elements: boundary conformance and curving of high aspect ratio cells encountered within the boundary layer region. In this webinar, we will address these challenges by demonstrating the generation of a linear mesh for the Rotor 37 geometry, followed by the elevation of the linear mesh. Because geometry-mesh associativity is known, inserted nodes are properly constrained to the underlying geometry. Additionally, our optimization-based smoothing scheme propagates boundary perturbations into the interior of the mesh, ultimately improving the quality of the resulting high-order mesh and ensuring its validity.
Discover how to:
- Generate high-order meshes using Pointwise V18.2 R1
- Improve meshing efficiency with the latest user interface enhancements
- Quickly apply 2-D T-Rex (anisotropic tetrahedral extrusion) to resolve surface curvature
To watch the webinar, visit https://info.pointwise.com/webinar-high-order-mesh-generation-using-pointwise.
About Pointwise, Inc.
Pointwise, Inc. is solving the top problem facing computational fluid dynamics (CFD) today – reliably generating high-fidelity meshes. The company’s Pointwise software generates structured, unstructured, overset and hybrid meshes; interfaces with CFD solvers such as ANSYS FLUENT, STAR-CCM+, OpenFOAM, and SU2 as well as many neutral formats, such as CGNS; runs on Windows, Linux, and Mac, and has a scripting language, Glyph, that can automate CFD meshing. Manufacturing firms and research organizations worldwide have relied on Pointwise as their complete CFD preprocessing solution since 1994. For more information, visit http://www.pointwise.com.