[Matiasi]

Hi everyone

I am using Ansys Meshing
I need to mesh a cylinder, i know this should be easy but, my cylinder has a cut with smaller cylinder form in his base (see image),
and i think this bothering me to get a uniform mesh (sweep, quads). I have tried many thing that i have seen in this forum and tutorials, but i cant get it
maybe is easy, but sorry, i haven't found the way

I thought separate my body in 2 body, the lower body (cylinder with the cut), and the higher body (a single cylinder), and then meshing each one of these separately.
but when I tried it, the face in common avoid uniform mesh, if i did this, after when I simulate with fluent, this could give result different than if I did this with a 1 only body and 1 only part?

I would like read information about this last (use add frozen, add slice, slice o other methods to get more bodies) how does affect to final result?

I need element smaller around cylinder axis, and the axial size of element about 1 mm

size of cylinder
Diameter 200 mm
Height 350 mm

Cut cylinder
Diameter 1 mm
Height 5 mm

attached many images, few things I have done.

thank for you attention

best regards

general.png

try 1.jpg

try 1 bottom.jpg

Try 1 bottom zoom.jpg

try 2.png

[harry8227]

hi,

to obtain uniform mesh create the smaller cylinder passing through the bigger cylinder and keep that cylinder in one part.

[wali]

Check this link..
https://www.youtube.com/watch?v=XSVX...8UAfAHz4oEsYDL

Might be possible it helps you.

[Matiasi]

thanks for your help,
I have tried that, guess, because I don't understand very well that you mean, but I have tried creating a cylinder smaller, although, I create 1 part to all bodies (that's It do you mean?), the problem is the smaller cylinder is not a thru-hole, It just drills the bigger cylinder 5 mm

well, when I try with a cylinder body (add frozen) sealing the thru-hole, I get a drills of 5mm in the bigger cylinder and I get this results


try 4.jpg
try 4 zoom.jpg


but I need a finer mesh near of cylinder axis, so I use "Face Split" to draw 2 lines in the upper face, and then I use "Edge Sizing" to do finer mesh near of cylinder axis
this way



sizing.jpg



but I get this result


try 5.jpg



I lost the uniform mesh, indeed i tried with mapped face, but got this errors:

-"the following body cannot be swept because the following target face mesh does not match the souce mesh. Clear face mesh from the following face and try again"
-"The source mesh cannot be correctly copied to the target surface. this is usually because the surface is a closed surface with degenerate points. split the surface and try again"

-I need uniform mesh
-Finer mesh near of cylinder axis
-Axial size element about 1 mm, like the first image is good, but sometimes, when I use other condition, size increases
(I have used face split to set the axial size, but I don't get good results, the similar way like I said before)


do you understand me?

[harry8227]

hi,
for unifrom mesh u hv to do the face split in the lower faces also.

[Matiasi]

Hi

thanks, I tried with split face in lower face, but i get this

new.png
results.jpg
results 2.jpg

I tried with another conditions, "edge sizing" only in upper face, only in lower face, both.
"mapped face" only in upper face, only in lower face, both, in cylindrical face
but I got errors or nonuniform mesh.

also I tried with "split face" in cylindrical face to set axial element size, but It doesn't work

I keep trying other conditions that occurs to me
If you have other suggestion please tell me

Best regards