Naslov
Flow and Suspension Characteristics of Gas-Liquid-Solid Suspension

Autori
Patterson, Gary ; Chandavimol, Maethee ; Kuzmanić, Nenad

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Mixing XVIII, 18th Biennial Conference on Mixing, North American Mixing Forum of AIChE / Dickey, David - Dayton (OH) : AIChE, 2001

Skup
Mixing XVIII, 18th Biennial Conference on Mixing, North American Mixing Forum of AIChE

Mjesto i datum
Pocono Township (PA), Sjedinjene Američke Države, 24.06.2001. - 29.06.2001

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Gas dispersion; solids suspension; mixing vessel; LDV; CFD

Sažetak
The work considers the hydrodynamic problems associated with demands of simultaneous gas dispersion and solids suspension with one single Rushton impeller. The formation of ventilated cavities behind the impeller blades and the associated decrease of shaft power and pumping capacity play a dominant role in these systems. Increased impeller speeds are required in order to maintain suspension in gassed system. Turbulent-flow parameters were measured with a laser-Doppler velocimeter (LDV). Simulation of the air bubble dispersion and calculation of bubble trajectories using the Lagrangian method have been preformed. The CFD program FLUENT was used in the particle tracking mode to do the simulations of dispersed, transitional, and flooded conditions in a Rushton turbine stirred vessel with an air sparger. Results showed that the method could produce gas flow patterns qualitatively similar to those observed in experiments. Results of simulation obtained at flooding conditions have shown a very good agreement with experimental data.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA