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How can get 4-5 elements in a narrow channel?

yta10
Advocate

How can get 4-5 elements in a narrow channel?

yta10
Advocate
Advocate

Hello,

 

I did a bit of experiment on my tubing with mesh.

I changed volume adjustment value from 1 to 0.6.

When I looked at the mesh for fluid, as the volume adjustment values lower, meshes are formed more densely toward the wall. I would like to know why this happens.

From tutorial, I learned that 4-5 elements through any narrow channel considered to be good. So, I counted the number of elements on the surface views, they are all more than 5 elements, ( i counted the triangles, and i assumed the fluid that flows in the tubing is a narrow channel) How can I get the 4-5 elements in the narrow channel?

Capture.PNG

 

And How can i plot Nodal aspect ratio and Y+ value? I can't find them on my menu.

Captur1e.PNG

And this is my mesh data

Captu22re.PNG

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Anonymous
Not applicable

To control elements in gaps, you should use Fluid Gap Elements Refinement tool, you let the default value so far (3) that is why. Try 8 now. Refer to the user guide if not familiar.

http://help.autodesk.com/view/SCDSE/2019/ENU/?guid=GUID-9041CE1B-717F-44B7-BC49-BD84EA26E7ED

 

NAR can be found under Stream Function within results quantities tab, it's off by default. Same for y+.

 

General volume adjustment will just refine the overall seeds distribution. It can be enough to build a good grid, as it cannot. All depends on the geometry, its size and the regions of interest. 

 

 

I suggest you to keep going the mesh generation tests, there is no better way to learn the true impact of each available parameter (along with reading the user guide, meshing process). You are working with circular volumes, thus resolution factor could help you to control the seeds

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