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-   -   [ICEM] Average cell size (http://www.cfd-online.com/Forums/ansys-meshing/75923-average-cell-size.html)

beguxa May 9, 2010 23:48

Average cell size
 
I have a mesh of huge no of cells generated through ICEM-CFD. How to check average cell size in ICEM-CFD?

Thanks,:confused:

PSYMN June 7, 2010 13:46

Mesh Quality Criterion and the Mesh Report
 
Sorry I missed this one before... Hopefully you figured it out, but just in-case not and for others who may follow this thread...

First, you need to better define "element size", do you mean you want to know the average volume? Or the average Max Edge length per element? Once you know your criterion...

1) Look under Info => Mesh Report.

This will generate an HTML Mesh report that lists the histograms for all the checks. But if you look in the message window, you will see the summary for each histogram which includes the min, max and mean.

For example, here is a cut and past from the message window with a few quality checks, including volume, for my made up Tetra/Prism model ...

8795 elements with the "Volume" diagnostic
Total = 176000
Min = 0.613816, max = 5.23489, mean = 1.43805571347
8795 elements with the "Volume change" diagnostic
Min = 0.102187, max = 167.684, mean = 47.5945999407
10111 elements with the "Surface area" diagnostic
Total = 481229
Min = 0.801887, max = 0.999285, mean = 0.940109929078

2) You could also just go to the Edit Mesh Tab => Display Mesh Quality and choose the correct Quality Type Criterion from the pulldown...

Here is "Volume"

Min = 0.0680032, max = 107.979, mean = 20.0113700966
8795 elements with the "Volume" diagnostic
1316 elements for which this diagnostic is undefined
Total = 176000
Histogram of Volume values
102.58005 -> 107.979 : 1 (0.010%)
97.1811 -> 102.58005 : 1 (0.010%)
91.78215 -> 97.1811 : 0 (0.000%)
86.3832 -> 91.78215 : 1 (0.010%)
80.98425 -> 86.3832 : 1 (0.010%)
75.5853 -> 80.98425 : 7 (0.069%)
70.18635 -> 75.5853 : 9 (0.089%)
64.7874 -> 70.18635 : 14 (0.138%)
59.38845 -> 64.7874 : 34 (0.336%)
53.9895 -> 59.38845 : 53 (0.524%)
48.59055 -> 53.9895 : 118 (1.167%)
43.1916 -> 48.59055 : 195 (1.929%)
37.79265 -> 43.1916 : 464 (4.589%)
32.3937 -> 37.79265 : 2046 (20.235%)
26.99475 -> 32.3937 : 749 (7.408%)
21.5958 -> 26.99475 : 626 (6.191%)
16.19685 -> 21.5958 : 483 (4.777%)
10.7979 -> 16.19685 : 342 (3.382%)
5.39895 -> 10.7979 : 625 (6.181%)
0.0 -> 5.39895 : 3026 (29.928%)


And here is "Max Side"...

Min = 1.25297, max = 12.7411, mean = 6.43074868955
10111 elements with the "Max side" diagnostic
Histogram of Max side values
12.104045 -> 12.7411 : 8 (0.079%)
11.46699 -> 12.104045 : 39 (0.386%)
10.829935 -> 11.46699 : 95 (0.940%)
10.19288 -> 10.829935 : 154 (1.523%)
9.555825 -> 10.19288 : 390 (3.857%)
8.91877 -> 9.555825 : 703 (6.953%)
8.281715 -> 8.91877 : 1132 (11.196%)
7.64466 -> 8.281715 : 1017 (10.058%)
7.007605 -> 7.64466 : 2345 (23.193%)
6.37055 -> 7.007605 : 438 (4.332%)
5.733495 -> 6.37055 : 281 (2.779%)
5.09644 -> 5.733495 : 255 (2.522%)
4.459385 -> 5.09644 : 277 (2.740%)
3.82233 -> 4.459385 : 486 (4.807%)
3.185275 -> 3.82233 : 595 (5.885%)
2.54822 -> 3.185275 : 665 (6.577%)
1.911165 -> 2.54822 : 1064 (10.523%)
1.27411 -> 1.911165 : 166 (1.642%)
0.637055 -> 1.27411 : 1 (0.010%)
0.0 -> 0.637055 : 0 (0.000%)


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