A NUMERICAL SIMULATION AND VALIDATION STUDY OF THE MATHEMATICAL MODEL OF DROPLET FORMATION IN DROP ON DEMAND INKJET PRINTER AND THE EFFECT OF RHEOLOGICAL PROPERTIES OF POLYMERINK FOR AUTOMOBILE LIGHTING APPLICATION

A majority of the modern inkjet printers utilise drop on demand devices because of its precision in terms of time and easy control. The time-dependent fluid interface disruption renders the fluid dynamics process during droplet ejection complex. The current work attempts to provide an idea of the drop ejection behaviour based on the computation of energies required for droplet formation and splat formation. The simulation results for various nozzle diameters with different polymer inks are examined and it is validated with computational model. Further attempt is made to analyse the effect of rheological properties like viscosity and surface tension in the droplet formation.