Modelling of immiscible liquid-liquid systems by Smoothed Particle Hydrodynamics

Area of Science:

• Computational fluid dynamics
• Multiphase flow simulation
• Applied physics

Background:

• Immiscible fluid systems are prevalent across various scientific and industrial domains.
• Understanding fluid behavior and phase morphology is crucial for applications like microfluidic device design.
• Existing simulation methods may have limitations in handling complex multiphase interactions.

Purpose of the Study:

• To present a novel Smoothed Particle Hydrodynamics (SPH) approach for simulating immiscible fluid systems.
• To incorporate surface tension, incompressibility, and multiple fluid phases with varying properties.
• To enable the study of dynamic phenomena such as droplet break-up and coalescence.

Main Methods:

• Development of an SPH model capable of handling multiple immiscible fluid phases.
• Implementation of surface tension and incompressibility constraints.
• Inclusion of diverse fluid constitutive models, including non-Newtonian fluids.
• Validation against established problems like the Young-Laplace equation and shear flow deformation.

Main Results:

• The SPH model successfully simulates arbitrary phase morphologies and their time evolution.
• Demonstrated ability to model phenomena like droplet break-up and coalescence.
• Accurate reproduction of results for benchmark problems, validating the model's predictive power.
• Successful application to elucidate complex behaviors in immiscible liquid systems.

Conclusions:

• The developed SPH approach provides a robust tool for analyzing immiscible fluid dynamics.
• The model's flexibility allows for diverse applications in engineering and scientific research.
• This method enhances the understanding and design of systems involving multiphase fluid interactions.