Now is the time to sign-up to participate in the 2nd AIAA Geometry and Mesh Generation Workshop to be held the weekend prior to AIAA SciTech 2019 in San Diego where we will push meshing into the exascale, assess progress during the previous year and half, exercise meshing in a design environment, and discuss how to quantify the effects of the mesh on the CFD results.
It’s hard to believe it’s been over a year since the inaugural AIAA Geometry and Mesh Generation Workshop (GMGW). The first workshop was such a success that AIAA is hosting a second on 5-6 January 2019 in San Diego prior to the SciTech Forum and Expo.
TL;DR
Go to gmgworkshop.com and click on the link to sent your Intent to Participate email today.
Why are we doing this?
The Meshing, Visualization, and Computational Environments technical committee was inspired to launch the GMGW as part of taking ownership of the critiques of preprocessing in the NASA CFD Vision 2030 Study.
- principal bottleneck
- dominant cost
- inability to produce a usable mesh on the first attempt
- inadequate linkage with CAD
AIAA’s successful workshop model (Drag Prediction, High Lift Prediction, Propulsion Aerodynamics, Sonic Boom, Aeroelasticity) seemed like the perfect venue to assess the state of the art, identify areas for improvement, and document best practices in geometry modeling and mesh generation as they relate to CFD.
The 1st GMGW was co-located with the 3rd AIAA CFD High Lift Prediction Workshop (HiLiftPW-3) and we worked together on meshing and computing a solution for the NASA High-Lift Common Research Model (HL-CRM).
What’s GMGW-2 about?
The 2nd GMGW is being held on its own as a bridging event between GMGW-1 and the planned GMGW-3 which again (we hope) will collaborate with the HiLiftPW. The cases at GMGW-2 include the following.
- Exascale Meshing of the HL-CRM
- Remeshing of the HL-CRM
- Parametric Meshing of the OPAM-1
- Mesh Effects on CFD Solutions Mini-Symposium
Exascale Meshing of the HL-CRM
The NASA CFD Vision 2030 Study indicates that meshes in the year 2030 may need to be much larger than they are today to meet accuracy requirements for the types of complex configurations envisioned.
Rather than wait another 12 years to attempt it, one of the GMGW-2 test cases involves building a 30 billion cell mesh for the HL-CRM specifically to find out which parts of our processes break and fail. To be clear, this case is designed to cause problems that we can fix now before we have to generate this size of mesh for real.
View from below the wing of the HL-CRM showing flap (blue) and slat (orange).
Remeshing of the HL-CRM
A second GMGW-2 case involves repeating the GMGW-1 meshing exercise on the HL-CRM from which we hope to accomplish one of two things.
- From those who didn’t participate in GMGW-1, we will collect more data on the current state of the art.
- From repeat customers, we will quantify how things have changed in the 18 months since GMGW-1.
Parametric Remeshing of the OPAM-1
The CFD Vision 2030 Study described the various stages of the design process in which CFD is used. During preliminary design, you probably won’t be generating exascale meshes but rather hundreds or thousands of smaller meshes.
The OPAM-1 test case is a notional aircraft generated in a conceptual design modeler for which participants will remesh the configuration subject to changes in various design parameters.
The OPAM-1 (Open Parametric Aircraft Model #1) is a notional commercial transport.
Looking Forward to GMGW-3
A big part of GMGW-2 will be a mini-symposium on the afternoon of the workshop’s second day where we will focus on topics related to the next workshops.
- A special presentation on the geometry model of the HL-CRM as designed and built for wind tunnel tests, the planned subject of HiLiftPW-4. This model is quite a bit more detailed than the HL-CRM used in GMGW-1 and GMGW-2.
- An extended roundtable discussion – after a few brief keynote presentations – on how to design numerical experiments for future CFD workshops that are likely to yield data that can be used to quantify how the mesh effects CFD results.
Sign-up to Participate Today
Go to www.gmgworkshop.com and click the link to send us your Intent to Participate. This email includes information on which cases you’ll participate in (you can do only one if you choose) and whether you’ll stay for the mini-symposium. It will also add you to our workshop email list for future communications.
We look forward to seeing you in San Diego in January. Due date for your meshes and other data is 30 September.
Important: Official registration and payment will be handled by AIAA through the SciTech website beginning in September. The Intent to Participate email only assists with the technical committee’s planning. Also, you do not need to register with AIAA if you will only attend the mini-symposium However, we would still appreciate receiving your intent to participate email for planning purposes.
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