1.2. ONERA M6 Wing with WebUI#

The ONERA M6 wing is a swept, semi-span wing with no twist that uses a symmetric airfoil. Widely known to aerodynamicists, the model serves as a classic reference to validate CFD methods for external flow due to its ideal combination of a simple geometry and a complex transonic flow. More information about the ONERA M6 Wing can be found at NASA’s website. The model used here has a normalized root chord of 1 m, resulting in the following geometric parameters:

  • Mean Aerodynamic Chord (MAC) = 0.80167 m

  • Semi-span = 1.47602 m

  • Reference area = 1.15315 m2


The mesh used for this case contains 113k nodes and 663k tetrahedrons, and the flow conditions are:

  • Mach Number = 0.84

  • Reynolds Number (based on MAC) = 11.72 Million

  • Alpha = 3.06°

  • Reference Temperature = 297.78 K

1.2.1. Get CFD results in two simple steps#

After you sign in, visit https://flow360.simulation.cloud/volumemeshes.

Step 1. Upload the Volume Mesh File:

To upload a volumetric mesh file, under the Volume Mesh tab click on Upload icon as displayed below:


This will open a window as shown in the next figure. You need to upload the volume mesh file here. Download an example mesh of M6 Wing here. When uploading the mesh, endianness will be automatically set to ‘little endian’. More information on endianness can be found here. (Note: Mesh Name and Tags are optional. For Release History, the latest solver version will be used here by default.) Then click submit to upload and process your mesh. You can see the status of the mesh under the Status heading.


Step 2. Launch a CFD Case:

You do not have to wait for your mesh to be processed. Once your mesh is uploaded you can start the case submission process. To start a new case, click on the airplane icon under the Actions heading as shown below.


Once you click the airplane icon, the webpage will re-direct you to an interactive interface to either generate a case configuration json online or upload a pre-configured JSON file via Upload JSON file.


Please use this Flow360.json file for the current case and upload it via the pop-up window prompt.


A full dictionary of configuration parameters for the JSON input file can be found here. You may also provide a Case Name and Tags to track your case later on. Hit Submit to run your case. Once the case is submitted, you can check the status by clicking the Case tab.


1.2.2. Visualizing the Results#

While your case is running, or after that, you can visualize the Residuals and Forces plot by clicking on your case name and viewing them under the Convergence and Forces tabs, respectively.


For example, the Forces plots for this case are:

../../_images/CD_CL1.png ../../_images/CF3.png ../../_images/CM2.png

Once your case has completed running, you can also visualize the contour plots of the results under the Visualization tab. Contour plots for coefficient of pressure (Cp), coefficient of skin friction (Cf), y+, and Cf with streamlines are provided.


1.2.3. Downloading the Results#

Once your case has finished running, you can download the results (i.e., integrated loads, surfaces, volume and log) by clicking the download arrow under the Actions heading.


The volume and surface data can be postprocessed in either ParaView or Tecplot based on your selection of outputFormat in the Flow360.json file. The log file (flow360_case.user.log) can be used to view the solver progression and other run details.

1.2.4. Fork a Case#

You can also continue a case from the last point of the previous run by clicking the Fork icon under the Actions heading. Once the case is forked, you may change the parameters of your Flow360.json configuration file according to your needs, or upload an entirely new configuration file.

../../_images/ForkCase1.png ../../_images/ForkCase2.png

1.2.5. Deleting a Case or Mesh#

You can delete a case or a mesh file by clicking on the trash can icon under the Actions heading. Caution: mesh and case files (including results) cannot be recovered once deleted.