Numerical simulation of heat transfer characteristics under semi-confined impinging slot jets

Abstract

The CFD simulation of impinging jet heat transfer under semi-confined slot jets are presented and discussed. While most results focus on both laminar and turbulent single jets of single phase fluid, simulation results for heat transfer in gas-particle suspension flow for multiple impinging jets are also presented. Initially, simulation results for a single semi-confined turbulent slot jet impinging were compared with published experimental data. The standard k-e and RSM models were used. Effects of boundary conditions, geometry parameters as well as fluid Pr number are discussed. Furthermore, heat transfer under multiple impinging jets of gas-particle suspension flow was predicted using an Eulerian-Lagrangian approach which included a new model to account for the conductive heat transfer contribution due to particle-wall collisions. The numerical results compared reasonably well with available experimental data. A parametric study characterizing the effect of geometric and particle parameters, and boundary conditions on heat transfer was conducted.