CFD simulation of gas hold-up as an important hydrodynamic parameter in an airlift reactor with net draft tube

In this work, the gas hold-up in the airlift reactor with net draft tube was simulated and the performances of two drag models are evaluated in computational fluid dynamics (CFD) simulation. The range of superficial gas velocity was 0.94 -9.44 cm/s. A two-phase flow model provided by the bubbly flow application mode was employed in this project. In the liquid phase, the turbulence can be described using the k-ε model. Simulated gas holdup results were compared with experimental data obtained from the literature. The .predictions of the simulation are in good agreement with the experimental data