Reynolds Equation and Mixing Length Model
Examples of Turbulent Boundary Layer Dimensions
For
,
,
,
.
For water
and the corresponding boundary layer length scales are shown in the table.
Turbulent boundary layer length scales
|
(m/s)
|
(mm)
|
Buffer Layer (mm) |
Inner Layer (mm) |
(mm)
|
1 |
0.043 |
0.023 |
0.69 |
4.6 |
23 |
5 |
0.215 |
0.047 |
0.138 |
0.92 |
4.6 |
10 |
0.43 |
0.0023 |
0.069 |
0.46 |
2.3 | Note also that
|