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Bubble rising and interaction in ternary fluid flow: a phase field study.
1School of Mathematics and Statistics, Yancheng Teachers University Yancheng 224002 PR China.
RSC Advances
|February 9, 2023
Summary
A new phase field model simulates bubble-droplet interactions in wastewater treatment
Area of Science:
- Fluid dynamics
- Computational physics
Background:
- Bubble-droplet interactions are crucial for gas-flotation wastewater treatment.
- Experimental methods have limitations in fully understanding fluid flow dynamics.
Purpose of the Study:
- To develop and validate a phase field model for three-phase flow.
- To investigate single bubble rise and bubble-droplet interactions.
Main Methods:
- Utilized a phase field model coupled with Navier-Stokes equations.
- Employed Cahn-Hilliard equation for interface tracking.
- Discretized using explicit finite difference method and projection method for pressure-velocity coupling.
- Developed in-house Fortran code with OpenMP for parallel processing.
Main Results:
- Model validated against experimental data with high accuracy.
- Simulated two scenarios: bubble crossing an interface and bubble chasing a droplet.
- Provided insights into fluid flow during bubble-droplet interactions.
Conclusions:
- The developed phase field model accurately captures bubble-droplet interactions.
- The model serves as a valuable tool for understanding gas-flotation processes in wastewater treatment.
- Further research can explore more complex scenarios and fluid properties.
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