Fluid Dynamics In Micro Dosing Actuators

A simulation model for bubble 'et driven micro do- sing actuators has been developed. Calculation results are mass and velocity of Jected drops and detailed aspects of the flow process. Capable to simulate almost every combination of heating actuator design, actuator performance, How chamber and nozzle geometry it can serve to optimize the design of future dosing actuators. Thermodynamics of vapor bubble growth and fluid dynamics of drop ejection are sepa rately calculated in finite-volume schemes. The free surface of the forming drop is modeled.