Table 2: FEM results of air mass balance and flow speed with one bulla (diameter 1.25 mm).

Data	Mass balance (kg/s)
Maximum speed (m/s)	16.584
Inlet	19.062 x 10 -5
Outlet 1	-9.148 x 10 -5
Outlet 2	-9.914 x 10-5
Loss	4.51 x 10-5