NUMERICAL STUDY OF THE INFLUENCE OF THE AMBIENT PRESSURE FIELD ON FREE PLANE TURBULENT VERTICAL JETS AND PLUMES

To help resolve the inconsistencies observed when examining measured properties of free plane jets and plumes, a numerical study was performed to determine the influence of a weak ambient motion and of the associated pressure field on the flows of free plane vertical turbulent jets and plumes. A nested grid control volume technique with the buoyancy-extended k-e model plane was used to model turbulent jets and plumes issuing into open spaces as veil as into two-dimensional rooms of various sizes. The results indicate that slight variations in the ambient pressure distribution affect jet and plume development and similarity relationships.