Computational fluid dynamics · 2026

Flow made visible.

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 field
Rushton gas volume fraction
Rushton 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 field
Pitched-blade cross sectional flow
Pitched-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