The presented mathematical model is simplified because it does
not take into consideration the two-dimensional flow, what definitely
exists near the outlets and mass balance. Even though the
real velocity distribution does not coincide with the mathematical
model, the mean value of velocity is similar to the one presented
in Fig. 9. In the cases presented in Figs. 6–8 it is necessary to set up
velocity distribution for laminarflowbecause of the Reynolds number,
however, the measured velocity distribution does not enable
it. It is because in laminar flow velocity distribution is parabolic
and maximum value of velocity is two times larger than average value of velocity. Priymak and Miyazakiy’s [11] numerical resolution
of the problem of flow in circular pipes for similar Reynolds
numbers suggests that character of the flow in this case is laminar.
However measured velocity distribution is not similar to parabolic
shape. Thus, the maximum value of velocity is not two times larger
than mean one. It might be caused by the two-dimension flow.