Learning Forum

[snr1]

How the number of elements along the axial direction of the 3D cylinder can be controlled in ANSYS meshing? Kindly help me with the procedure for this

[peteroznewman]

Use a Mesh Method, Sweep. You can enter the number of elements along the sweep direction.

[snr1]

Will you please elaborate on it step by step? I am unable to get what you are suggesting.

[peteroznewman]

The image you show looks like you are in Fluent. There are two places you can mesh: using Fluent Meshing and using ANSYS Meshing, which you specifically mentioned.
In Workbench, start with a Fluid Flow (Fluent) analysis system. Double click the Geometry cell and create the cylinder in SpaceClaim, then close SpaceClaim.
Now double click on the Mesh cell to open the Meshing software. Right click on the Mesh branch and Insert a Method.
Set the method to Sweep. Type in how many divisions you want.

[snr1]

Thank you for your detailed steps. I tried the same procedure. But the following error has been encountered. How to deal further with this issue.
"One or more non-sweepable bodies have sweep method controls and cannot be swept."
Geometry details: Stepped cylinder (Small cylinder or nozzle diameter = 2.2 mm, 20 mm length and bigger cylinder diameter = 33 mm and 1000 mm length)
Meshing methods used: a. Method: Multizone b. Mesh sizing for small and bigger cylinder diameter, and c. Face meshing of bigger cylinder
The image is attached.

[peteroznewman]

I did not see the nozzle in your first image. This makes that solid a non-sweepable body. The insructions below will cut that body up into 3 bodies, each of which are sweepable.
Open the geometry in SpaceClaim. On the Design tab, use Split Body to cut the nozzle off the cylinder. Hide the nozzle body. Sketch on the planar face of the cylinder a circle with the diameter of the nozzle. That will split the planar face into two faces. Pick the nozzle-sized face and use Ctrl-C, Ctrl-V to copy the face and paste a surface. Hide the surface. Use the Pull tool to pull the nozzle-sized face through the length of the cylinder. Unhide the surface. Use the Pull tool, select No Merge on the options. Click the surface, then use the Up To button (or type U on the keyboard) then click the other end of the cylinder. Now you have 3 bodies. Show all Bodies. On the Workbench tab click the Share button. Now the mesh will be shared at the coincident surfaces.
In the Meshing app, delete the Multizone control. Create two Sweep methods, one for the nozzle and one for the cylinder with the hole in it, since they each want a different number of elements along the sweep direction. The long nozzle-sized body inside the cylinder will automatically follow along with the mesh on the larger cylinder with the hole in it.

[snr1]

Thank you for your procedure. If you don't mind, kindly can you share any tutorial on this method?

[peteroznewman]

I forgot one step, at t=4:14, click on the Workbench tab, click on the Share button and click on the green check to create Shared Topology to get shared nodes on coincident faces between bodies.

[snr1]

Thank you, peteroznewman. That's great work and help from you