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April 26, 2009, 19:55 |
Reynolds number basis
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#1 |
New Member
Join Date: Apr 2009
Posts: 6
Rep Power: 17 |
How do I convert a Reynolds number based on momentum thickness (Re theta) to a Reynolds number based on boundary layer thickness (Re delta) ? This is for turbulent flow in a pipe over a rough boundary. any help would be greatly appreciated. thanks!!! |
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April 27, 2009, 13:41 |
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#2 |
Senior Member
Aroon
Join Date: Apr 2009
Location: Racine WI
Posts: 148
Rep Power: 17 |
In general the momentum thickness (for turbulent flows in pipe/channels) is about 7/72* BL thickness. So you can also use this ratio to compute your new Re.
You may also want to check if the following web-page is helpful. http://www.see.ed.ac.uk/~bille/teach...Layers9&10.ppt |
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