Hello,

I think there is a small error in the formula to compute the space between nodes when using the internal extrusion with the keyword "Extruded Mesh Ratio".

By definition in the documentation, Extruded Mesh Ratio is the ratio between the first and the last element and the element size is assumed to follow a geometric progression.

I made a test with

Extruded Mesh Levels = Integer 11

Extruded Mesh Ratio = Real 4.0

which do correspond to 10 layers and I expect that h_1 / h_10 = 4

The different h_i are

h_1 0.172599

h_2 0.150257

h_3 0.130805

h_4 0.113873

h_5 0.099133

h_6 0.086299

h_7 0.075128

h_8 0.065403

h_9 0.0569369

h_10 0.0495661

which is a geometric progression of common ration r = 1.1487

The ratio h_10/h_1 is 3.48 (which is r^(n-1)) where I would expect it to be 4 (and 4 = r^n)

Solution is in MeshUtils.F90 at lines 9816 and 9820 where 1.0_dp/n should be modified by 1.0_dp/(n-1)

Regards,

Olivier