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October 29, 2010, 14:58
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Grid spacing calculator
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Member
Aamer Shahzad
Join Date: Mar 2010
Posts: 58
Rep Power: 16  |
Hello All...
There is a GUI of calculating grid spacing geolab.larc.nasa.gov/APPS/YPlus/ - it requires Reynolds number, Reference length and value of Y+ in order to give grid spacing "ds" as output. Can anyone please tell me the formulae or steps working behind this interface, that calculate ds |
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November 22, 2010, 07:11
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#2 |
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New Member
Olivier Benichou
Join Date: Sep 2010
Location: Brisbane
Posts: 10
Rep Power: 15 |
Did you find out about how it computes the grid cell size ?
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November 23, 2010, 02:37
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#3 |
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Member
Aamer Shahzad
Join Date: Mar 2010
Posts: 58
Rep Power: 16 |
Still waiting for replies....
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November 27, 2010, 20:44
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it is about cell size more than yplus really
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#5 |
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New Member
Olivier Benichou
Join Date: Sep 2010
Location: Brisbane
Posts: 10
Rep Power: 15 |
thanks for the link Simon,
I was just wondering how the nasa calculator was working. it requires a Reynolds number, a y+ value and a characteristic lenght. I presume it is also using the viscosity. it provides a cell size as an output. I was thinking using that tool to give me idea an idea of the miniumum and maximum mesh cell size needed as it links yplus to cell size. However I liked to know how it works. rather than using it blindly. |
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November 27, 2010, 22:00
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#6 |
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New Member
Olivier Benichou
Join Date: Sep 2010
Location: Brisbane
Posts: 10
Rep Power: 15 |
Aamer,
I think i have worked out their formula, not sure though. check it up ! Ds= Re^(-0.9) . y+ . Lenght . 5.7 that for S.I http://geolab.larc.nasa.gov/APPS/YPlus/ |
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November 28, 2010, 19:54
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Go to the source?
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#7 |
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Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47 |
It is a long shot since the page was last edited 13 years ago... but you could always ask its creator, Bill Jones... His email is at the bottom left of the web page. If his email is out of date, you could try to find him on linked in...
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