Figure 10 - The final solid fat content in test #2 as a
function of position in the filter cake. The five triangles denote the
simulation results, while the test results are represented by the
overlapping symbols. The uncertainty in the simulation data has been
estimated from a number of simulations with varying calibration
coefficients.
a profile of solid fat content versus position in the cake. Something
similar, though for three slices, was done after completion of the
pertinent simulation. In the tests in the membrane filter press, the
cake was contained between two membranes, while in the simulation there
was just a single membrane (at the left-hand side). For the sake of the
comparison in Figure 10 the computed profile was mirrored. As expected,
the solid fat concentration is minimum in the middle of the cake in both
test and simulation. Note that the final thicknesses of the cake in the
test (24.3mm) and in the mirrored simulation (2 x 11.4mm) are not
exactly the same, since – due to the technicalities mentioned earlier
with respect to the start of the expression stage – also the initial
cake thicknesses were taken different. Given the experimental
inaccuracies and the simplifications of the 1-D model, the difference
between the two curves is surprisingly good.