Numerical Simulation on the Formation Process of Metal Droplets by Pneumatic Diaphragm Drop-on Demand Technology

In this paper, a theoretical analysis is carried out on the pneumatic diaphragm drop-on demand technology. The typical forming process of the droplet is analyzed, and the working principle of the pneumatic droplet injection is studied. The fluid calculation software FLUENT is used as the calculation platform to simulate the formation process of metal micro-droplets under gas pulse. Experiments demonstrate that this micro-jetting technology has a good performance on micron droplets generation and dispensing. And the experimental results agree well with the simulation results, which proves this simulation model and method is correct.