transition flow

[AIVC, Air infiltration and ventilation glossary, 1992]:the unstable region of flow that occurs when there is a change from a laminar to a turbulent flow regime.(see laminar flow; turbulent flow)

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turbulent flow

[AIVC, Air infiltration and ventilation glossary, 1992]:motion of fluids in which local velocities and pressures fluctuate irregularly.(see laminar flow; transition flow) [EN 12792:2003, 379]:flow that is characterized by a forward motion accompanied by irregular eddies associated with momentum transfer between Continue reading →