NUMERICAL-SIMULATION OF PARTICLE CONCENTRATION AT THE EXIT OF A DIRECT INJECTED ABRASIVE WATERJET NOZZLE

A computational fluid dynamics method has been used to predict the lik ely concentration distribution at the exit of a direct injected abrasi ve waterjet nozzle. Particle trajectories were simulated and the conce ntration at the nozzle exit is obtained by simulating a statistically significant large number of particles. The study takes into considerat ion the effect of the tapered nozzle inlet angle and the randomness in flow fluctuation and particle size distribution. No published experim ental data appear to be available. Validation of predictions is by com parison with experimental data for free air jets.