[Mfaizan]

Hi all,

I am trying to move blocks and relevant mesh to respective parts. But I have a problem that I am unable to generate a complete mesh for any of the part. For example, when I moved the nozzle blocks to nozzle part and create the mesh elements, it appeared to be like the image attached. I was unable to generate the complete mesh shape of nozzle, even though the blocks are present.


When I moved the block of HPGAS and created the mesh elements. It was incomplete

And for AIR geometry, a portion of nozzle was absent as per attached image.

Would anybody suggest as where am I making mistake? Am I selecting the wrong blocks or is any mistake in associated of edges? As per my understanding if I separate the blocks and generate the mesh, then mesh should have a complete shape of the geometry. Is it because of coarse mesh?

Please suggest. Your guidance will be much appreciated.

Regards,

Faizan

[Gweher]

Hi Faizan,

This looks like an association problem to me. It is recommended not to mix geometry and blocking elements within the same part, so you should create a specific part for your nozzle blocking.

Depending on how you associate your vertices/edges/faces, sometimes when you "move" the blocks to a new part the associations can go wrong. The first thing to do is to check the associations, you can update them under Blocking tab > Associate > Update Association (6th icon) > check Vertices, Edges, Faces > Apply

If it didn't fix your problem you need to re-associate your edges/faces and recompute the premesh.

Have a nice day

[Mfaizan]

Hi Gweher,

Many thanks for your response. I have managed to separate block in one part, then I created a separate topology for desired part and generated the mesh. It works fine with me as long as mesh export is concerned.

But I have another problem just aroused that when I brought the mesh in CFX-Post and sliced all domains from center to visualize the connectivity of nodes and mesh lines. I found some abnormal mesh lines and corrupted nodes. I am unable to understand why is had happened because before mesh export from ICEM I checked the mesh QUALITY and it was excellent.

I am attaching the pics. Please suggest.

Thanks in advance.

[Gweher]

Hi Faizan,

Happy that it solved your problem. Regarding the export can you describe your procedure ?

[Mfaizan]

Hi Gweher,

In ICEM, I converted the mesh to unstructured. Then in Output menu I chose ANSYS CFX solver and wrote the input file for CFX mesh exported with extension .cfx5.

Pl. suggest.

Faizan

[Gweher]

That's correct, I would add the boundary conditions before exporting. Do you mind sharing your .tin and .blk files ?

[Mfaizan]

Hi Gweher,

Thanks for your response. Actually I am always confused about the boundary conditions. In fact I wish to ask you about it like as where and which software should I put those boundary conditions. I mean should I put boundary conditions in ICEM? or Should I declare boundary conditions in ANSYS CFX-Pre? which method is suotable and preferable. As you know in CFX-Pre, you can choose boundar conditions by selecting correct faces of your mesh regions. Please suggest.

I tried attaching .tin and .blk files but it is giving me security error. Pl. suggest your email id so that I can forward you my project files.

Thanks in advance,

Faizan

[Gweher]

Hi Faizan,

It's easier to assign the boundary conditions within ICEM. Even if you want to change their type in CFX-Pre.

For the .tin and .blk I've send you a private message.

[Mfaizan]

Thanks Gweher- I have sent you the files on email you provided.

Look forward to hear from you,

Faizan