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.