Problem w/ export into an AcuSolve-file .inp

Rahul_P1

Hi everyone,

the following case is given:

For CFD first of all I imported a CAD geometry of a fluid. Then I 2D-meshed the surfaces (no problems, no free-edges, all trias...) and named it 'wall'. Subsequently a 3D tetramesh was done.

For the above process I organized some 2D elements into 'inlet' and 'outlet'-collectors in case of boundary layers (BL). The tetrameshed core + BL were organized into 1 collector named 'fluid'. Generating the ^faces of the fluid-colletor, some of this elements were organized into collectors called 'inflow' and 'ourflow'.

The next step is to export the 'fluid', 'in- and outflow' and 'wall' into an AcuSolve .inp file. The remain elements are set to invisible!

At the end of the export-process the following error message is displayed:

'No valid 3d element found in neighborhood of tria element' - export failed!

I found a solution: Ignoring the 2D mesh called 'wall' (delete or make it invisible), I renamed the elements of ^faces (after organizing some elements into 'inflow' and 'outflow') into 'wall'.
The following export works!

But my concern is, if the new 'wall' (origin: ^faces) is similar to the old 'wall' (origin: 2D mesh on CAD geometry)???

Rahul_P1

DG_Student_TUHH

It may not be similar, looks like the 2d mesh was not conformal to the 3d mesh, this could be because you used float instead of fixed while tetrameshing.

You can either proceed as you have done i.e. generate faces and use those surface elements or generate the tetramesh with the 'fixed' option.

Rahul_P1

Hi,

thank you!
You're right: I used float instead of fixed!

I'm so glad to have this support forum /emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>!!!

Rahul_P1

In case it helps: http://www.altairuniversity.com/wp-content/uploads/2012/09/HyperMesh_for_Solid-Fluid_meshing.pdf

RAMGANESH

Dear Sir,

 

I have been facing the same problem which you have discussed here 

 

i had followed the steps but i can't find the solution same error repeats

 

 

please provide your guidelines

 

Thanks

Ram

Altair Forum User

Dear Sir,

 

I have similar problems. I just started working with AcuSolve and I finished tutorials without any problem. In natural convection tutorial case, I tried to create the mesh in hypermesh for the better quality (with hex elements) , but couldn't export it to AcuSolve. I generated the mesh with CFD tetramesh modul, but I deleted the core part of the mesh and regenerated only with hex elems.

When I tried to export it, I got the following error message: 'Selected file.... does not have extension .inp or .arm Aborting....'

Before this message HM warned me about the boundary collectors, but I think collectors were created correctly. Do you have any idea how can I fix this problem? 

 

Thanks in advance!

 

Norbert

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi Norbert K.

 

You need to change the user profile to AcuSolve and then try export it.

 

 

Thank you