|February 22, 2017, 19:33||
Turbulent length scale
Join Date: Aug 2014
Posts: 122Rep Power: 4
Can somebody confirm me that the turbulent length scale that we need to input as a inlet condition (with the turbulent intensity) corresponds well to integral scale which is the size of the largest eddies and which is also to be found in this formula:
where is the Kolmogorov scale.
The reason I ask is that there is a lot of notation for turbulent length scale: , , , , etc.
Thank you for your help !
|February 23, 2017, 02:12||
Join Date: Feb 2017
Location: Leipzig, Germany
Posts: 140Rep Power: 3
is the length of the large eddies. It should not be larger than (the size of the problem) of course. can be guessed.
For pipe flows:
is the hydraulic diameter, which is identical the diameter for round pipes. For rectangular ones:
For flow around / past bodies:
is the size of the problem, for cylinders and spheres the diameter, for other bodies the diameter of the flow directed area.
Sie ahnen nicht, wieviel Poesie in der Berechnung
einer Logarithmentafel enthalten ist (Carl Friedrich Gauß)
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