TY - JOUR
T1 - CFD simulation of gas-liquid flows in a reactor stirred by dual Rushton turbines
AU - Kasat, Gopal R.
AU - Pandit, Aniruddha B.
AU - Ranade, V. V.
PY - 2008
Y1 - 2008
N2 - In the present work, we have simulated gas-liquid flows in a tall stirred reactor equipped with dual Rushton turbines. A two fluid model along with the standard k-ε turbulence model and modified drag coefficient, (proposed by Khopkar & Ranade, 2006) accounting for the effect of bulk turbulence, was used to simulate the dispersed gas-liquid flow in a stirred reactor. The multiple reference frames (MRF) approach was used to simulate impeller rotation in a fully baffled reactor. The computational model was mapped on to a commercial solver FLUENT 6.2 (of Fluent Inc. USA). The model was used to simulate three distinct flow regimes in a gas-liquid stirred reactor: L33-VC (lower impeller-upper impeller), S33-VC and VC-VC. The model predictions were compared with the published experimental data of Bombac & Zun (2000). The predicted results show good agreement with the experimental data for all the three flow regimes. The computational model presented in this work would be useful for simulating different flow regimes in a gas-liquid stirred vessel.
AB - In the present work, we have simulated gas-liquid flows in a tall stirred reactor equipped with dual Rushton turbines. A two fluid model along with the standard k-ε turbulence model and modified drag coefficient, (proposed by Khopkar & Ranade, 2006) accounting for the effect of bulk turbulence, was used to simulate the dispersed gas-liquid flow in a stirred reactor. The multiple reference frames (MRF) approach was used to simulate impeller rotation in a fully baffled reactor. The computational model was mapped on to a commercial solver FLUENT 6.2 (of Fluent Inc. USA). The model was used to simulate three distinct flow regimes in a gas-liquid stirred reactor: L33-VC (lower impeller-upper impeller), S33-VC and VC-VC. The model predictions were compared with the published experimental data of Bombac & Zun (2000). The predicted results show good agreement with the experimental data for all the three flow regimes. The computational model presented in this work would be useful for simulating different flow regimes in a gas-liquid stirred vessel.
KW - Computational fluid dynamics
KW - Dual Rushton turbine
KW - Flow regimes
KW - Gas hold-up distribution
KW - Stirred reactor
UR - http://www.scopus.com/inward/record.url?scp=48849102006&partnerID=8YFLogxK
U2 - 10.2202/1542-6580.1628
DO - 10.2202/1542-6580.1628
M3 - Article
AN - SCOPUS:48849102006
SN - 2194-5748
VL - 6
JO - International Journal of Chemical Reactor Engineering
JF - International Journal of Chemical Reactor Engineering
M1 - A60
ER -