Simulation of Piezoelectric Inkjet Printing Using Fluid Structural Interaction

As inkjet printers have recently been used to manufacture organic/quantum dot light-emitting diode displays, stable ink drops and control have become important during the printing process. This paper proposes a combination simulation of Ansys Fluent and Ansys Mechanical to find the conditions of stable ink droplets. To confirm the feasibility of the simulation, a jetting simulation of Newtonian fluids with practically constant viscosity was performed, and the results were compared with experimental results. Next, we performed a simulation of commercial non-Newtonian ink whose viscosity changed with a change in shear rate and compared the results with the experimental results. The experimental and simulation outcomes differed under the same voltage conditions. The study findings show that inkjet simulation can be employed not only to find stable drop conditions but also to observe changes in pressure in the inkjet nozzle.