Abstract

Results of numerical simulation of 2D and 3D how held in a single slot jet discharging tangentially into a confined cylinder are presented. This geometry is relevant to new impingement dryers. An extended ic-E turbulence model with a near-wall function treatment is used to simulate turbulent jet flows. A finite element weighted residual method is used to solve the governing mars, momentum, turbulent kinetic energy and turbulent kinetic energy dissipation equations. The computations were performed for the Reynolds number ranging from 3200 to 31900. Slot width is varied from 0.5 to 1.0 cm. To verify the algorithm, numerical tests were performed to ensure that the solutions were grid independent. The mesh was constructed with four-node quadrilateral elements. Flow fields, velocity profiles, jet trajectories, recirculating flows and geometry effects were investigated. Recirculating hows were found for Reynolds lower than 6300. Desired velocity profiles were found for Reynolds upper than 15000 with slot width of 1.0 cm. (C) 2000 Elsevier Science S.A. All rights reserved.