What is it about?

A novel on-demand droplet generator is reported, based on off-the-shelf electromechanical components. The device's assembly does not require a specific manufacturing process and can be built from widely available components. Droplet generators are essential instruments used in many fields, including printing, spray processes, and surface impact studies. Single droplet experiments are commonly conducted to study droplet formation, evolution, stability, evaporation, surface impact, and combustion.

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Why is it important?

Drop on demand techniques promise accurate droplet generation and high repeatability. Challenges arise, however, when an attempt is made to utilize current droplet generation devices in various applications. Difficulties such as satellite droplets, shape distortion, bubbles, and trajectory variation are common operation challenges. Therefore, researchers often turn to other experimental approaches where an acceptable compromise is usually adapted. With the ability to produce a broad range of droplet sizes, this device was designed to have minimum components without compromising reliability. This system could easily be implemented in other research areas.


The reported instrument has the following merits: scale and portability, pressure control method, adaptability and versatility, ease of assembly, repeatable performance.

Ahmed Albadi
University of Sheffield

Read the Original

This page is a summary of: A versatile droplet on demand generator based on active pressure control, Review of Scientific Instruments, December 2020, American Institute of Physics,
DOI: 10.1063/5.0022936.
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