3D Unstructured MESHING
 

Hi All,
I am new to ICEM and after a few days of reading the manuals and going through many threads in the forum, i have kind of been able to form my mesh(unstructured) for the benchmark case of flow past the cylinder. As you can see from the images, I have used prism to form meshes around the cylinder and also density mesh around the same area. The flow direction is + X. The mesh sizes are assigned using the part mesh and i have tried to change the size of the part meshes,but there was not much change. I have now assigned only 6 layers for the prism and still there is a problem with how the meshes are divided as they go further. I actually want more layers but then the mesh gets worse.
Can anyone please help with me what i can do to improve the mesh?

I will first simulate a uniform flow condition for a low Reynolds number. Later i want to investigate with a higher Reynolds number. In that case to capture the vortices should i extend the prism meshes further down the wake field?

Waiting for a reply

Thanks in advance
Arun

Attachment 18952

Attachment 18953

would you mind if i ask why you not try structured mesh for a simple geometry like this ?

Thanks for you reply.
This case is just to help me learn and simulate a simple problem using ICEM/Fluent. The actual problem i will be tackling is different and i have to use unstructured mesh. So i am just using the same for this problem.

Also :) my supervisor said.

Can you guide me?

why you have these curve here ??

https://dl.dropbox.com/u/35161486/arun.PNG

ya, i am working on the mesh and realized that could be the problem. It is because i have divided the surface in that way to give more points on the circle.

Not sure what is an alternative though?

Regards
Arun

this is a just a simple geometry to perform test on it. would you mind sharing ? so i and others can investigate the problem ?

Hi there,

Thank you. I have uploaded 3 file the .prj,.uns and.tin.
Hope you will be able to view it.


http://www.4shared.com/file/se6MBx3e/3d-cylinder.html
http://www.4shared.com/file/cYc4LPBN/3d-cylinder.html
http://www.4shared.com/file/AQXHsfMI/3d-cylinder.html

Thanks
Regards
Arun

please use any free file hosting website that doesn't requires registration. i don't have access to shared4 as i'm not member. use dropbox. it is useful for everything !!

you don't have to join the uns file and the mesh just the project is fine...

Hi ,

I have attached it in dropbox and shared with u.

Thanks
Arun

thank you very much, another thing by prj, i mean tin file too because it contains the geometry. sorry for being demanding...

I have attached. Come on you are trying to help me. Its my bad.

Arun

yes it is because of those curves you need to delete them

problem fixed, the project is saved...

Can you please tell me what you did? I cannot view it now. I can only see it tomorrow.What was the mistake i did?

Thanks a lot for your help.

Regards
Arun