Multiphase CFD investigations of gas–liquid mixing in mechanically agitated reactors, with an emphasis on simulation stability, flow fields, and gas dispersion.
Rushton impeller simulation utilizing Eulerian Multiphase Model
4.0M+Computational cells
250 rpmImpeller speed
6 portsGas injection array
1 mmBubble diameter
Impeller simulation studies
A direct comparison of radial and axial-flow mixing configurations, with animations of velocity, gas dispersion, and cross-sectional impeller flow.
01 — RADIAL FLOW
Rushton impellers
Flat-bladed disc turbines generate strong radial jets and high local shear, but offer poor mixing towards the bottom of the vessel.
→Radial discharge pattern
→High gas-dispersion capability
Rushton velocity fieldRushton gas volume fractionRushton cross-sectional flow
02 — AXIAL FLOW
Pitched-blade impellers
Angled blades drive a strong axial pumping pattern, producing top-to-bottom circulation with lower shear than a Rushton turbine.
↓Axial pumping direction
↓Bulk vessel circulation
Pitched-blade velocity fieldPitched-blade cross sectional flowPitched-blade gas dispersion
Model architecture
A reproducible workflow built around geometry preparation, mesh quality, phase interaction models, transient convergence, and physically meaningful results.
Geometry
7 L vessel with 5 L working volume and 6-port ring sparger
Multiphase
Eulerian or Volume of Fluid (VoF)
Turbulence
Realizable k–ε and k–ω SST model investigations
Motion
Transient sliding mesh and steady-state multiple reference frame (MRF) with rotating and stationary fluid zones
Platform
ANSYS Fluent 2025 R2 on Ohio Supercomputer Center resources