The efficiency related to the SMX+6 is higher than the one in the
SMX10 by a factor of 2.85. This gives an advantage for using the
SMX+6 in the sense that the energy consumption is less for reaching
the same shear rate. It also means that the length of the SMX+6
used in this study (0.06 m) could be increased up to 0.15 m while
still maintaining the same efficiency as opposed to the SMX10 of
0.25 m length. This could be taken into account according to the effect
of the residence time towards the bubble breakup and the final
bubble foam diameter.