Eulerian 2-Phase Flow in a Convergent-Divergent Channel

Description

This module uses ANSYS Fluent to simulate Eulerian two-phase flow through a convergent-divergent channel, applying the Eulerian multiphase model to a geometrically complex flow system relevant to chemical processing, oil and gas, power generation, and aerospace applications. The simulation examines how changing channel cross-section affects phase interaction, momentum transfer, and flow behavior between two immiscible fluids.

Methodology

A pre-configured convergent-divergent channel geometry is used, with a mesh designed to accurately capture phase coupling across the varying cross-sections. Fluid inlet and outlet conditions, including flow rates, velocities, and phase fractions, are configured to represent realistic multiphase operation, alongside wall boundary conditions accounting for roughness effects. The Eulerian model is fine-tuned with appropriate drag and lift models for the immiscible phases, along with turbulence modulation and phase coupling effects to capture momentum exchange between phases.

Conclusion

Results include phase fraction and velocity profile contours along the channel, pressure drop quantification, and analysis of phase separation tendencies and flow regime transitions as the flow moves through the convergent and divergent sections. The simulation reveals how channel area changes and convergent-divergent angle affect phase distribution and velocity, providing insight relevant to optimizing multiphase flow systems and heat transfer performance in industrial equipment handling immiscible fluid interactions.