February 10, 2023 at 6:39 amRamesh Chandra MishraSubscriber
I have created my mesh externally but when I am importing my mesh to Fluent, it gives the following error and same is the case for every node in the mesh.
ERROR: Can't read the co-ordinates for node 4555678.
Your help is highly appreciated.
February 10, 2023 at 10:28 amSRPSubscriber
What is the extension of mesh file that you created and importing to fluent?
February 10, 2023 at 12:24 pm
February 10, 2023 at 1:40 pmRobAnsys Employee
Assuming the mesh is 3d, is there an error at the start of the read in process? The failure to read the coordinates could be a result of that.
February 10, 2023 at 2:31 pm
February 10, 2023 at 2:38 pmRobAnsys Employee
So no hints immediately before the coordinates fail to load? Will Fluent Meshing read the file?
February 10, 2023 at 2:43 pmRamesh Chandra MishraSubscriber
Right....No hints before. I have tried importing in fluent meshing, ansys mesh, ICEM CFD but nothing is working out.
February 10, 2023 at 3:47 pmRobAnsys Employee
Then it would suggest the output from OpenFOAM isn't working as expected. Is it specific to this case or a more general issue?
February 11, 2023 at 7:32 amRamesh Chandra MishraSubscriber
Actually I have been trying this for the first time..so don't have much idea.
February 14, 2023 at 9:52 amRobAnsys Employee
You may be better off creating the mesh using Ansys products. Otherwise, create a small mesh and see what happens.
February 16, 2023 at 5:22 amRamesh Chandra MishraSubscriber
I started meshing with Ansys products but everytime it gave a lot of errors. Eventually I switched to OpenFOAM but again I got stuck here.
February 16, 2023 at 11:59 amRobAnsys Employee
February 16, 2023 at 2:03 pmRamesh Chandra MishraSubscriber
Following errors were encountered during ANSYS Meshing:
a) one or more entities failed to mesh.
b)one or more surfaces cannot be meshed with acceptable quality.
c)the source mesh cannot be correctly copied to the target surface.
d)a software execution error occured inside the mesher
February 16, 2023 at 2:13 pmRobAnsys Employee
OK, b & c are the parts to focus on. Why didn't the surface mesh, which is often caused by poor choices of cell size or corrupted geometry. The source mesh error can be either a geometry issue or linked to some of the automatic options in Meshing. For 3D we tend to use Fluent Meshing now as it's quicker.
February 17, 2023 at 4:43 amRamesh Chandra MishraSubscriber
Rob, I really appreciate you giving your time. I have tried Fluent Meshing too. But it gives unstructured mesh but I need hexahedral meshing.
February 17, 2023 at 10:14 amRobAnsys Employee
Why do you need a hex mesh? We've been using poly mesh for several years and it's proving to be equivalent/superior to hex for accuracy whilst being a lot easier to do.
February 17, 2023 at 12:39 pmRamesh Chandra MishraSubscriber
There are few problems I faced while using Fluent Meshing. In the last step of creating volume mesh, it takes a very long time or process does not even move forward. Secondly I do not get the desired mesh quality.
February 17, 2023 at 12:41 pm
February 17, 2023 at 1:23 pmRobAnsys Employee
How much RAM have you got? Did the mesh pass the checks in Fluent Meshing?
February 17, 2023 at 1:33 pmRamesh Chandra MishraSubscriber
32 GB RAM. Please note that above screenshot is for mesh I am importing, not the one I created using Fluent meshing.
February 17, 2023 at 1:48 pmRobAnsys Employee
Importing from where? If it's the OpenFOAM mesh read it into Fluent Meshing as the errors may be more diagnostic.
February 17, 2023 at 4:02 pm
February 17, 2023 at 4:27 pmRobAnsys Employee
Assuming you can read a simple mesh into Fluent it's likely a problem with the file or file format. Please run through a tutorial to see if that works. Note, we're running 2023R1 now so you may want to look at updating the version.
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