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CFD Simulation of Air Flow Patterns in a Spray Dryer Fitted With a Rotary Disk | ||
| Iraqi Journal of Chemical and Petroleum Engineering | ||
| Article 1, Volume 17, Issue 2, 2016, Pages 69-77 | ||
| Authors | ||
| Saad Nahi Saleh; Laith Amjad Hameed | ||
| Abstract | ||
| The air flow pattern in a co-current pilot plant spray dryer fitted with a rotary disk atomizer was determined experimentally and modelled numerically using Computational Fluid Dynamics (CFD) (ANSYS Fluent ) software. The CFD simulation used a three dimensions system, Reynolds-Average Navier-Stokes equations (RANS), closed via the RNG k −ε turbulence model. Measurements were carried out at a rotation of the atomizer (3000 rpm) and when there is no rotation using a drying air at 25 oC and air velocity at the inlet of 5 m/s without swirl. The air flow pattern was predicted experimentally using cotton tufts and digital anemometer. The CFD simulation predicted a downward central flowing air core surrounded by a slow recirculation zones near the walls for both conditions. Analysis of CFD simulation revealed that rotation of atomizer resulted in a swirling motion of the central air core. Simulations results were in good agreement with experimental data. | ||
| Keywords | ||
| CFD; Spray; Rotary; Dryer; Simulation | ||
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