[image] I am a new user to Simscale, Please help me solve this error. I don’t understand the error. I have created the model using CATIA V5 and converted it into STEP file. I am trying to employ ‘Automatic Snappy Hex Mesh for External Flow’.

@ch3316 , you can calculate visualize drag after the simulation using Paraview. This little blog post provides guidance on how to do it: Aerodynamics Post-Processing with SimScale and ParaView . To compute the drag coefficient of the whole body, the result control items within SimScale ( SimScale Docu…

Hi @ch3316 Thank you for reaching out to us. I have taken a look at your project and found no issues with your STEP CAD import. So the mesh Error basically points to some internal failure during the meshing process. Our product team ( @jprobst ) will take a look at it and we will get back to you …

Hi @ch3316 thanks for posting the error! We are looking into this and will report back once resolved. All the best, Johannes

Hi, Thanks for looking into my problem, but I have solved the mesh problem but having problems with simulation. I changed CAD file file to stl format and cleaned the surfaces using ‘feature angle surface’ geometrical operation. Mesh was generated and it is fine. I don’t know how change in file form…

Yeah, That is the model. Thanks.

Hi @ch3316 , so I had a quick look at the results: [image] The velocity says peak at 3.6e16 which is clearly unphysical since you ran a sim with 60mph. So there either is an issue with the mesh or a numerical issue or both. Then I looked at the mesh you used. The meshing log indicates that this m…

Hi, Thanks for your help David. I didn’t think about checking the mesh. I like to know how to calculate initial K and omega values for the simulation. I have theoretical knowledge of CFD theories but I like to know how to do a good estimate of initial k and omega. Thanks

Hi, With the new mesh I have created, I have started a new simulation. However it stopped running after very few iteration. My mesh details are shown in the following figure. [image] The error shown for the simulation: [image] Is this due to mesh having high number of nodes and cells. I have…

Hi @ch3316 , your mesh has 12 million cells, so that should be a piece of cake for a 32 core machine. I copied your project and will give it a try myself. Will get back to you once I know what’s the issue. Best, David

@ch3316 , so I tweaked a bit the numerics + simulation control settings and started a run myself. Will post it here soon - but when looking closer at your project, you already have working simulation runs, right? The 2nd and 3rd of your half model look good, don’t they? [image] Having the pressu…

SimScale CAE Forum

Mesh Error

Project Support

dheiny May 13, 2016, 7:59pm 5

Hi @ch3316,

could you hint me to your project such that I can have a look at the setup? Is it this one: SimScale ?

Thanks!

David