This discovery of natural '"zero energy" flow control by an international research ... engineers design more efficient chemical reactors, air purification systems, heat exchangers, hydraulic ...

Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

Choked flow in control valves is a subject of serious concern for industrial users. The term is usually associated with destructive process conditions that can damage valve internals or expose ...