OR-94-06-1 -- Numerical Prediction of a Turbulent Fountain in a Room PDF

A numerical prediction is presented for an axisymmetric buoyant air jet discharge vertically downward into a room. An algebraic stress model was used to close the mean transport equations which were then solved using the finite-volume method. The numerical method tracked the initial development of the jet. The negative buoyancy leads to flow reversal; the resultant flow pattern resembles an inverted fountain. The recirculation associated with the fountain has significant implications for the level of thermal mixing achieved by the jet.

KEYWORDS: calculating, turbulent flow, buoyancy, air jets, vertical, rooms, recirculating, air movement, air flow, heat flow, warm air heating