Theory 36/Weber Number/Inkjet printing
Drop Formation Needs a Weber Window
The claim
Stable drop-on-demand printing requires the Weber number to lie within a window, so increasing drive amplitude beyond it produces satellites rather than better drops.
01Mechanism
Too low and the drop cannot separate from the nozzle; too high and it fragments into satellites.
02Prediction
Print quality should peak within a Weber window.
03Refutation
Quality increasing with drive amplitude would remove the upper bound.