siphonjet

Siphonjet is a term encountered in limited technical and hobbyist literature to describe a device that combines siphoning action with a jet or jet-pump mechanism to transfer liquids between vessels. There is no single, widely adopted definition, and the term is not standardized in mainstream fluid dynamics literature. In general, a siphonjet is described as a compact assembly that uses an initial prime to start a siphon and then employs a jet-related effect to sustain flow across a small head difference, potentially increasing the efficiency of liquid transfer compared with a simple siphon.

Design and operation: A typical siphonjet concept involves a siphon tube connected to a jet or aspirating nozzle. The jet creates a region of reduced pressure at the siphon inlet, helping to draw liquid through the tube. The apparatus may include a restriction, vent, or valve to control start-up and prevent backflow. Performance depends on liquid properties, tube geometry, and ambient pressure.

Applications: In practice, siphonjets have appeared in hobbyist projects, some microfluidic demonstrations, and certain patents describing self-priming transfer concepts. They are not common in industrial equipment, where dedicated pumps and siphon configurations are preferred for reliability and control.

See also: siphon, jet pump, aspirator, venturi, microfluidics.