Don’t Miss the Mesh Effects Symposium at GMGW-2

HL-CRM-OPAM-1-comboThe 2nd AIAA Geometry and Mesh Generation Workshop (GMGW-2) is happening this January in San Diego prior to AIAA SciTech. One interesting component of the workshop is a mini-symposium on Mesh Effects on CFD Solutions that’s free for anyone attending SciTech. 

The GMGW-2 workshop on 5-6 January 2019 begins with participant presentations on each of the workshop’s three test cases and summary presentations by workshop organizers on the meshing performance data collected by all participants.

The due date for participant submissions has been extended by two weeks to 12 November so there’s still time to get involved with just two easy steps.

  1. Go to the GMGW-2 workshop website and click the link under the Intent to Participate heading. That gets you on our list for planning purposes.
  2. Go to AIAA’s SciTech website and register for the conference and our workshop.

Case 1: Exascale Meshing of the HL-CRM

The goal of case 1 is to generate an Order 10.5 (aka “2018 Hero” resolution, 31 billion cell) mesh for the HL-CRM rev. 2 geometry model.

Case 1 is designed to break our tools and processes in order to learn what needs to be fixed before the year 2030 when Order 10.5 will be Medium (aka everyday) resolution, not Hero resolution.

Participants are asked to generate the largest mesh they can up to Order 10.5 and use the Participant Questionnaire to describe where they encountered problems.


NASA’s HL-CRM Geometry Model is to be used for Cases 1 and 2 at GMGW-2.

Case 2: GMGW-1 Remeshing of the HL-CRM

The goal of case 2 is to repeat the GMGW-1 exercise of generating an Order 8.5 (316 million cells, Medium resolution) mesh for the HL-CRM rev. 2 geometry model. Participants may also choose the optional part of this case, generation of a mesh family consisting of Coarse, Fine, and/or Extra Fine resolutions.

For first-time workshop participants, their data will add to what was collected during GMGW-1 for evaluating the state of the art. For participants who also participated in GMGW-1, their data will document progress made on meshing processes and tools in the intervening year and a half.

Case 3: OPAM-1 Parametric Remeshing


The Open Parametric Aircraft Model (OPAM-1) will be used for Case 3 at GMGW-2.

The OPAM-1 case explores the ability to rapidly and robustly mesh parametric variations of a geometry model. A secondary goal is the rapid generation of geometry models. The intent is to simulate the application of CFD in a design environment.

STEP files are provided for five required configurations of the OPAM-1 aircraft as is the numerical recipe used to create it in the ESP software for participants who choose to run more than the five required configurations.

Mini-Symposium – FREE

Here’s the fun part. Sunday afternoon at GMWG-2 will be devoted to two forward-looking events – forward-looking as in planning for GMGW-3 and the 4th AIAA CFD High Lift Prediction Workshop (HiLift-PW4). The first is a look at the geometry model to be meshed in GMGW-3 and the second is an open-discussion on how to design numerical experiments that will allow us to draw conclusions about mesh effects on CFD solutions.

And attendance at both of these is open to all SciTech attendees. You don’t have to pay the registration fee for GMGW-2.

The NASA HL-CRM Wind Tunnel Model – A Geometry-Handling Perspective

A wind tunnel model of the NASA High-Lift Common Research Model (HL-CRM) has been designed to provide experimental data for 4th AIAA High-Lift Prediction Workshop. This presentation will review the salient aspects of the geometry model used to define this wind tunnel test hardware from the viewpoint of its use for mesh generation and CFD.

Mini-Symposium: Mesh Effects on CFD Solutions

This mini-symposium is intended to provide a brief overview of this topic and provide a forum to explore how the design of numerical experiments can be improved to allow data to be gathered identifying both the strength of the effect of the mesh on solution variability and the mesh features that have the biggest impacts. The outcomes will be used to inform the design of both GMGW-3 and HiLiftPW-4 so that meaningful data can start to emerge on this topic.

We only ask that folks let us know they’re coming to the mini-symposium for planning purposes.

  1. Go to the GMGW-2 workshop website and click the link under the Intent to Participate heading.

See You in San Diego

We hope you’ll participate in GMGW-2 either by generating meshes and sharing your results or by coming to the mini-symposium and helping us collect useful data.


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