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-   -   Mesh Reference Values problem. (http://www.cfd-online.com/Forums/star-ccm/78331-mesh-reference-values-problem.html)

rezki July 19, 2010 04:11

Mesh Reference Values problem.
 
Hello,

I want to create the following example of the tutorial:
Training Guide > Meshing Tutorials > Control Valve Meshing Tutorial.

When I arrived at Setting the Global Mesh Reference Values step :
(Training Guide > Meshing Tutorials > Control Valve Meshing Tutorial > Polyhedral Meshing Exemple > Setting the Global Mesh Reference Values)

I could not to change mesh Reference values

For example, I could not introduce the value of 4.0 into: Prism Layer Thickness > Relative Size > Percentage of Base, a value of 33.3 is always imposed and it remains unchangeable.

Please,
What can be reason for that ?

Best regards
Rezki

bengy July 19, 2010 04:19

hmmm 1-st: relative to base ->percentage of base, then your prism layers will be "percenatge" depend. 2-nd: change relative to base->absolute size and then add your constatnt value

rezki July 19, 2010 05:02

Hi,

Thank you very much for your help.
Ok, but in the tutorial, they recommended to use relative to base.

The parameters which will be used for this meshing tutorial are here:

Reference Node Name
Property Name
Value
Base Size
Value
0.06 m
CAD Projection
Project to CAD
true (default)
Number of Prism Layers
Number of Prism Layers
2 (default)
Prism Layer Stretching
Prism Layer Stretching
1.5 (default)
Prism Layer Thickness > Relative Size
Percentage of Base
4.0
Surface Curvature
# Pts/circle
36 (default)
Surface Growth Rate
Surface Growth Rate
1.3 (default)
Surface Proximity
# Points in a gap
2.0 (default)
Surface Proximity
Search Floor
0.0 (default)
Surface Size > Relative Minimum Size
Percentage of Base
4.0
Surface Size > Relative Target Size
Percentage of Base
8.0
Tet/Poly Density
Growth Factor
1.0 (default)
Tet/Poly Density
Density
1.0 (default)
Tet/Poly Volume Blending
Blending Factor
1.0 (default)

Best regards.

bengy July 19, 2010 05:09

ok, I agree, but what do you do when you want to have 6 mm prism layer thickness ( how many percentage ?? ) ? I think that better way is using absolute size and have maximum control of prism layers thickness

regards

rezki July 19, 2010 05:12

Hi,

Thank you very much for your help.
Ok, but in the tutorial, they recommended to use relative to base instead absolute.


Base Size > Value > 0.06 m

Prism Layer Thickness > Relative Size > Percentage of Base > 4.0

Surface Size> Relative Minimum Size > Percentage of Base> 4.0

Surface Size > Relative Target Size > Percentage of Base > 8.0


Best regards.

rezki July 19, 2010 05:15

Hi,

Thank you very much for your help.
Ok, but in the tutorial, they recommended to use relative to base instead absolute.


Base Size > Value > 0.06 m

Prism Layer Thickness > Relative Size > Percentage of Base > 4.0

Surface Size> Relative Minimum Size > Percentage of Base> 4.0

Surface Size > Relative Target Size > Percentage of Base > 8.0


Best regards.

bengy July 19, 2010 05:16

I give up so maybe other will help you

best regards

rezki July 19, 2010 05:30

Hi

I don't know why several answer are create :confused: , I have just seen that. I am really sorry.


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