# # #

1 1 1 1 11 1

*wall h N h*

a

**Figure 11.** Normal curve showing the percentage of observed cases as the area limited by the curve.

The data of [18] were first used to test equations (55-58). Different normalizations lead to different adjusted coefficients, because of the different distributions of errors. It was observed here that equation (57) shows the best adjustment to measured data, furnishing the coefficients shown in equation (87), and the adjustment of Figure 12. The obtained correlation coefficient was 0.996. *L* is used without index (*r* or *j*) because both lengths (roller and jet) are used in the

' 1 1 1 1

2 1

96 Hydrodynamics - Concepts and Experiments

braces in equation (86) is substituted by *J*(max).

2

**3. Data analyses**

following analyses.

**3.1. Length of the roller**

a

*M*
