HEAT TRANSFER IN MULTIPLE-TURBULENT-SLOT IMPINGING JETS OF GAS–PARTICLE SUSPENSIONS

ABSTRACT

The heat transfer in a dilute gas–particle suspension flow through multiple-slot impinging jets has been numerically investigated employing a new Eulerian-Lagrangian model. The two-phase turbulent flow is simulated using the standard k–ϵ model and Lagrangian particle tracking, which includes coupling terms to simulate the fluid–particle interactions. The numerical results are compared with the available experimental data. Good agreement between the experiment and simulation is obtained only if the conduction heat transfer due to particle–wall collisions is considered in the model. Effects of particle loading ratio, wall reflection coefficient, and wall materials properties on the heat transfer rate are discussed.