Direct Numerical Simulation of Droplet Collisions in a Turbulent Channel Flow. Part II: collision rates

• Published in: International journal of multiphase flow Vol. 24; no. 7; pp. 1105 - 1138
• Main Authors: Chen, M., Kontomaris, K., McLaughlin, J.B.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.11.1999; Elsevier
• Subjects: Aerosols; Aerosols and foams; Chemistry; Coalescence; Colloidal state and disperse state; Computer simulation; direct numerical simulations; droplet collisions; Exact sciences and technology; Flows in ducts, channels, nozzles, and conduits; Fluid dynamics; Fundamental areas of phenomenology (including applications); General and physical chemistry; Multiphase and particle-laden flows; Nonhomogeneous flows; Physics; Suspensions (fluids); Turbulent flow; direct numerical simulations; droplet collisions; Turbulent flow; Pipe flow; Two-phase flow; Particle interactions; Digital simulation; Aerosols; Droplets; Particle suspension; Coalescence; Particle collision
• ISSN: 0301-9322; 1879-3533
• DOI: 10.1016/S0301-9322(98)00008-1

Part I of this paper extended previous methods of particle tracking in Direct Numerical Simulations (DNS) of turbulence by allowing for inter-particle collisions. Part II employs these methods to investigate the early stages of evolution of mono-size suspensions of coalescing droplets, uniformly released in air. The droplet diameter was varied in the range 3 to 17 μm. The average collision rate in the channel core was found to be strongly dependent on the droplet inertia.