[j_h_86]

Hello,

is there an option in ICEM to minimize the standard growth ratio of a "Patch-Independent-All Tri" surface mesh?

Best regards

[Far]

I am also looking for this option. May be size function can help...!!!

[BrolY]

From the documentation for ANSYS ICEM CFD 14.0 :

Tetra Size Ratio
controls the growth (edge length) of tetra mesh as it moves away from the surface.

For Octree Tetra mesh, size transitions are 2 to 1 locally, but you can still affect the transition rate over a larger number of transitions. For example, if the surface size is 2 and the volume size is 64, you may see something size transitions like the following:

Delaunay 2 3 4.5 6.75 10.13 15.19 22.78 34.17 51.26 76.89
Octree 2 2 4 4 8 8 16 32 32 64

If the ratio was 1.5, the big picture would show both the Octree and Delaunay sizes growing at a rate of 1.5, but the Octree method has to fit it to powers of 2 times the smallest size in the model. Also, you can imagine that changing this to 1.4 or 1.6 might not make that much difference to the Octree mesher, at least not for the first few layers, but would directly change the Delaunay progression.

[Far]

Originally Posted by j_h_86

Hello,

is there an option in ICEM to minimize the standard growth ratio of a "Patch-Independent-All Tri" surface mesh?

Best regards

Originally Posted by BrolY

From the documentation for ANSYS ICEM CFD 14.0 :

Tetra Size Ratio
controls the growth (edge length) of tetra mesh as it moves away from the surface.

For Octree Tetra mesh, size transitions are 2 to 1 locally, but you can still affect the transition rate over a larger number of transitions. For example, if the surface size is 2 and the volume size is 64, you may see something size transitions like the following:

Delaunay 2 3 4.5 6.75 10.13 15.19 22.78 34.17 51.26 76.89
Octree 2 2 4 4 8 8 16 32 32 64

If the ratio was 1.5, the big picture would show both the Octree and Delaunay sizes growing at a rate of 1.5, but the Octree method has to fit it to powers of 2 times the smallest size in the model. Also, you can imagine that changing this to 1.4 or 1.6 might not make that much difference to the Octree mesher, at least not for the first few layers, but would directly change the Delaunay progression.

.

@Broly: Yes it is. But I think he is looking for surface mesh growth.

[j_h_86]

Originally Posted by Far

.

@Broly: Yes it is. But I think he is looking for surface mesh growth.

Yes, as Far has indicated, I am looking for an option to modify the growth ratio of the surface mesh.

But anyway-thank you Broly for your answer!