Tweevloeisnozzles

Tweevloeisnozzles are a class of dual-channel fluid nozzle designed to deliver two liquids through a single outlet while allowing independent control of each stream. The name combines the Dutch twee (two) and vloeistof (fluid), reflecting the device’s two-fluid architecture and its engineering heritage.

In typical designs, two input conduits feed into a compact mixing chamber at or near the nozzle tip. The chamber promotes controlled interfacial interaction and helps generate a uniform spray or jet. Materials range from stainless steel to high-grade polymers, with precision machining or microfabrication to minimize dead volume. Some variants employ coaxial geometries, where one fluid is delivered through an inner passage and the other forms an annular sheath, enabling rapid mixing and fine adjustment of output composition.

Operation relies on two independent flow controls, usually via dedicated pumps or dispensers. The ratio of the two fluids can be set and maintained across a range of pressures, supporting rapid switching between formulations. Tweevloeisnozzles are compatible with a spectrum of liquids, typically favoring low to medium viscosity materials. Output can be tuned for spray characteristics, droplet formation, or coherent jets, depending on chamber geometry and operating conditions.

Applications span laboratory microfluidics, two-component adhesives and potting compounds, multi-material 3D printing, and precision agricultural spraying, where rapid material changes and controlled mixing are advantageous. They require clean fluids and regular maintenance to prevent clogging or cross-contamination, and may demand careful calibration of pumps and cleaning cycles.

See also: multi-fluid nozzle, coaxial nozzle, microfluidics.