Direct numerical simulation of droplet collisions in a turbulent channel flow. Part I: collision algorithm

Fundamental understanding of the complex behavior of small droplets or part icles in wall bounded turbulence and their interaction with the surrounding fluid is critical in a number of industrial processes. One approach for ga ining valuable insight is the direct numerical simulation (DNS) of turbulen ce in conjunction with numerical computation of particle trajectories. Most previous work was limited to dilute suspensions of non-colliding particles . Part I of this paper extends previous methods by allowing for interpartic le collisions. Part II presents results for the rate of collision between a erosol droplets. (C) 1998 Elsevier Science Ltd. All rights reserved.