Validation of the model
The other three tests of Table 1, carried out with a different edible
fat batch, were used for validating the expression model including the
coefficient of Eq. (1.30). The results for the outflow velocity profiles
are shown in Figure 7. Tests 3 and 4 are just duplicates, with an
identical simulated velocity profile, although test #4 was stopped
earlier than #3, and again show the spread in experimental results due
to the technicalities described above. In addition, the manual control
of the pressure profile adds to the spread. Note that in both tests #3
and #4, the pressure increase was interrupted twice (see Table 1), the
first time at the rather low pressure of 1 bar(g) that was maintained
for a few minutes; in the simulations this obviously did not result in
an outflow. The agreement between simulation and test is far better
again in test #5 where, just like in tests #1 and #2, pressure was
increased continuously (though in an different way) up to the same final
maximum pressure.