A Combined Numerical and Experimental Study of Hydrodynamics for an Air-Water External Loop Airlift Reactor | Zendy

Deify Law | Zendy; Samuel T. Jones | Zendy; Theodore J. Heindel | Zendy; Francine Battaglia | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

A Combined Numerical and Experimental Study of Hydrodynamics for an Air-Water External Loop Airlift Reactor

Author(s) -

Deify Law,

Samuel T. Jones,

Theodore J. Heindel,

Francine Battaglia

Publication year - 2011

Publication title -

journal of fluids engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.529

H-Index - 103

eISSN - 1528-901X

pISSN - 0098-2202

DOI - 10.1115/1.4003424

Subject(s) - mechanics , computational fluid dynamics , bubble , airlift , work (physics) , multiphase flow , superficial velocity , flow (mathematics) , bubble column reactor , range (aeronautics) , eulerian path , materials science , volumetric flow rate , physics , thermodynamics , gas bubble , chemistry , bioreactor , organic chemistry , composite material , mathematical physics , lagrangian

The external loop airlift reactor (ELALR) is a modified bubble column reactor that is composed of two vertical columns that are interconnected with two horizontal tubes and is often preferred over traditional bubble column reactors because they can operate over a wider range of conditions. In the present work, the gas-liquid flow dynamics in an ELALR was simulated using an Eulerian―Eulerian ensemble-averaging method in two-dimensional (2D) and three-dimensional (3D) coordinate systems. The computational fluid dynamics (CFD) simulations were compared to experimental measurements from a 10.2 cm diameter ELALR for superficial gas velocities ranging from 1 cm/s to 20 cm/s. The effect of specifying a mean bubble diameter to represent the gas phase in the CFD modeling was investigated, and 2D and 3D simulations were found to be in good agreement with the experimental data. The ELALR flow regimes were compared for the reactor operating in bubble column, closed vent, and open vent modes, and the 2D simulations qualitatively predicted the behavior of bubble growth in the downcomer. However, it was found that 3D simulations were necessary to capture the physics of the ELALR for gas holdup, bulk density differences, and riser superficial liquid velocity.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research