%0 Journal Article %1 noauthororeditor %A Liu, Y. %A Derby, B. %D 2019 %J Physics of Fluids %K 76e09-stability-and-instability-of-nonparallel-flows 76t10-liquid-gas-two-phase-flows-bubbly-flows ink-jet %N 3 %P 032004 %R 10.1063/1.5085868 %T Experimental study of the parameters for stable drop-on-demand inkjet performance %U https://www.researchgate.net/publication/331666243_Experimental_study_of_the_parameters_for_stable_drop-on-demand_inkjet_performance %V 31 %X We present an experimental study of drop-on-demand inkjet behavior, with particular emphasis on the thresholds for drop generation and formation of satellite drops, using inks covering a range of fluid properties. Drop behavior can be represented as a “phase diagram” in a parameter space bound by the dimensionless number Z (the inverse of the Ohnesorge number) and the Weber number of the fluid jet prior to drop formation, Wej. Stable drop generation is found to be bounded by a parallelogram with minimum and maximum values of 2 < Wej < 25. The lower bound indicates where capillary forces prevent drop ejection, and the upper bound indicates the onset of satellite drop formation. For Z < 50, the critical Wej for drop ejection increases with decreasing Z because of the contribution of viscous dissipation during drop formation. This requires an increase in the voltage required to drive the piezoelectric actuator until at Z ≈ 0.3 no drop ejection is possible. With Z > 4, the value of Wej at which satellite drops form decreases with increasing Z until at very large values of Z single drops can no longer form at any Wej. However, despite the large range of fluid properties over which stable drops can form, the need for a large range of both Z and Wej limits the region of practical ink design to the approximate range of 2 < Z < 20. These results are shown to be compatible with current models of the drop formation process reported in the literature.

@article{noauthororeditor, abstract = {We present an experimental study of drop-on-demand inkjet behavior, with particular emphasis on the thresholds for drop generation and formation of satellite drops, using inks covering a range of fluid properties. Drop behavior can be represented as a “phase diagram” in a parameter space bound by the dimensionless number Z (the inverse of the Ohnesorge number) and the Weber number of the fluid jet prior to drop formation, Wej. Stable drop generation is found to be bounded by a parallelogram with minimum and maximum values of 2 < Wej < 25. The lower bound indicates where capillary forces prevent drop ejection, and the upper bound indicates the onset of satellite drop formation. For Z < 50, the critical Wej for drop ejection increases with decreasing Z because of the contribution of viscous dissipation during drop formation. This requires an increase in the voltage required to drive the piezoelectric actuator until at Z ≈ 0.3 no drop ejection is possible. With Z > 4, the value of Wej at which satellite drops form decreases with increasing Z until at very large values of Z single drops can no longer form at any Wej. However, despite the large range of fluid properties over which stable drops can form, the need for a large range of both Z and Wej limits the region of practical ink design to the approximate range of 2 < Z < 20. These results are shown to be compatible with current models of the drop formation process reported in the literature.}, added-at = {2019-10-21T00:32:36.000+0200}, author = {Liu, Y. and Derby, B.}, biburl = {https://www.bibsonomy.org/bibtex/20f6ba17381efa621651ff4230433f05f/gdmcbain}, doi = {10.1063/1.5085868}, interhash = {eb8dceac67fcd73cf8c6a8e6b4069aa6}, intrahash = {0f6ba17381efa621651ff4230433f05f}, journal = {Physics of Fluids}, keywords = {76e09-stability-and-instability-of-nonparallel-flows 76t10-liquid-gas-two-phase-flows-bubbly-flows ink-jet}, number = 3, pages = 032004, timestamp = {2019-10-21T00:32:36.000+0200}, title = {Experimental study of the parameters for stable drop-on-demand inkjet performance}, url = {https://www.researchgate.net/publication/331666243_Experimental_study_of_the_parameters_for_stable_drop-on-demand_inkjet_performance}, volume = 31, year = 2019 }