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wall y-plus problem: unable to manage between 30 to 300..kindly help.. |
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February 8, 2014, 02:18 |
wall y-plus problem: unable to manage between 30 to 300..kindly help..
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#1 |
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maaz ahmad
Join Date: Dec 2011
Location: india
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i am pasting the problem link here, below,,, images also attached here...
http://www.cfd-online.com/Forums/mai...-building.html |
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February 12, 2014, 10:54 |
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#2 |
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Lefteris
Join Date: Oct 2011
Location: UK
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What turbulence model do you plan to use?
Are you going to use FLUENT (or CFX) for you analysis? If so, Menter suggests to follow a y+=1 strategy and use a y+_insensitive turbulence model. I think that most of their models are like that now but take that with a pinch of salt as I'm not absolutely sure.
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February 13, 2014, 23:41 |
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#3 | |
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maaz ahmad
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Quote:
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February 14, 2014, 14:51 |
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#4 | |
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Lefteris
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Quote:
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February 15, 2014, 00:13 |
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#5 |
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maaz ahmad
Join Date: Dec 2011
Location: india
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actually when i refine the mesh to get values of y+=1, gambit crashes with the error: out of memory..so i cant take that much fine mesh..if you can suggest me anything for this ..please..
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February 15, 2014, 21:05 |
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#6 |
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Lefteris
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I don't know if there's going to make much difference but try y+<5 and enhanced wall treatment in Fluent. If you gambit crashes again, go again for y+>30 and standard wall functions.
However, I believe that you should refine your grid generally, not just near the walls.
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Lefteris |
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February 21, 2014, 05:41 |
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#7 |
New Member
maaz ahmad
Join Date: Dec 2011
Location: india
Posts: 21
Rep Power: 14 |
my ske and rng values are showing much difference ...anyone can point out the reason...
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