Computational Fluid Dynamics Blogs

Tomorrow morning, Cadence's Travis Carrigan and Nick Wyman will be participating in NASA's Advanced Modeling and Simulation (AMS) Seminar series when they share some of our latest progress in adaptive mesh generation. Here are the details of their presentation on Geometry-Sensitive, Solver-Independent Mesh Adaptation Using Hybrid Viscous and Hex-Core Meshing Techniques.

Simulation has the potential to provide insight, improve time-to-market and reliability, and reduce program cost. This assumes however, there is confidence in the results. And while there may be variations in turbulence modeling and numerical schemes, mesh generation tends to be less programmatic and more subjective despite the significant effect on solution accuracy. This is due in part to the fact that mesh generation is often done a priori and remains largely a manual process. Complex geometries, off-design prediction, inconsistent best practices, hardware availability, and even personal preferences influence the consistency with which meshes are generated within an organization.

At Cadence we recognize this and, in this presentation, will introduce a repeatable and user-independent approach to mesh generation using Pointwise by leveraging a goal-oriented framework coupled with hierarchical cartesian off-body meshing and adaptation. By focusing on meshing goals early in the process, company best practices can easily be standardized, resulting in more consistency and higher throughput. In addition, we'll show that by estimating truncation error and computing a target mesh-edge length, followed by updating the mesh with each adaptation step, we can robustly conform to the underlying geometry while retaining the boundary layer mesh resolution and schedule. In the end, this process improves mesh quality as adaptation progresses and with it so, too, does confidence in the results.

The initial mesh (top) need only resolve relevant geometry and is evolved into the final, adapted mesh (bottom) as directed by the flow solver for accuracy and efficiency.

• Title: Geometry-Sensitive, Solver-Independent Mesh Adaptation Using Hybrid Viscous and Hex-Core Meshing Techniques
• Presented by: Nick Wyman and Travis Carrigan
• When: September 9, 2021, 9:00 a.m. PDT
• Where: online using Teams

See all the details at NASA's AMS Seminar webpage.