Numerical Study of a Turbulent Offset Jet Flow

Abstract

Sixth Conference on Design and Modeling of Mechanical Systems (CMSM 2015), Hammamet, TUNISIA, MAR 23-25, 2015International audienceA dynamic study of the mean flow behavior of a three-dimensional turbulent offset jet issuing into a quiescent ambient is presented. The flow is characterized by a longitudinal variation of curvature, skewed impingement onto a flat surface, a recirculating region, and the development of a wall jet region. A numerical simulation is used, by means of the finite volume method with the second order turbulent closure model: the Reynolds stress Model (RSM), to investigate the influence of certain parameters such as jet discharge height and the geometric nozzle. Flow structure is described in the preimpingement, recirculation and impingement regions. Interdependence is shown among the offset height (h) and the geometric nozzle (plane jet and circular jet). The obtained results are presented in terms of the jet dimensionless velocity distribution, maximum velocity decay and vectors velocity of the flow. The jet decay is presented. The recirculation region is fed by a relatively strong backflow for the reported high offset height and it is shown that the reattachment point depends strongly with the jet form and the offset height

Numerical Simulation of an Offset Jet in Bounded Pool with Deflection Wall

“…Kishore and Dey [14] provided an experimental investigation of hydraulic characteristics of submerged offset jets by ADV; the streamwise velocity profiles were measured at different sections. The work of Assoudi et al [15] studied the mean flow behavior of a three-dimensional turbulent offset jet issuing into quiescent ambient; they reported high offset height and it is shown that reattachment point depends strongly on the jet form and the offset height.…”