Bubble Formation in Yield-Stress Fluids Using a Coupled Level-Set and Volume-of-Fluid Method
Baixu Cao1, Lina Bai1, Zhaochen Hu1
1College of Energy and Environment, Shenyang Aerospace University, Shenyang, Liaoning 110136, P. R. China.
Bubble formation in yield-stress fluids was numerically studied. Larger orifice diameters and higher fluid rheological properties increase bubble detachment volume, with shear-thinning fluids showing the smallest formation time and volume.
Area of Science:
- Fluid Dynamics
- Rheology
- Computational Physics
Background:
- Understanding bubble formation in non-Newtonian fluids is crucial for various industrial processes.
- Yield-stress fluids exhibit complex flow behaviors distinct from Newtonian fluids.
Purpose of the Study:
- To numerically investigate bubble formation dynamics in yield-stress fluids.
- To analyze the influence of orifice diameter and fluid rheology on bubble formation parameters.
- To compare bubble formation in yield-stress fluids with Newtonian and shear-thinning fluids.
Main Methods:
- Employed a coupled level-set (LS) and volume-of-fluid (VOF) numerical method.
- Validated numerical simulations against experimental data for bubble formation.
- Investigated the effects of orifice diameter, consistency coefficient, flow index, and yield stress.
Main Results:
- Bubble detachment volume increases with orifice diameter, consistency coefficient, flow index, and yield stress.
- Bubble formation time and detachment volume were lowest in shear-thinning fluids.
- Newtonian fluids showed intermediate bubble formation characteristics compared to shear-thinning and yield-stress fluids.
Conclusions:
- Orifice diameter and rheological properties significantly impact bubble formation in yield-stress fluids.
- The rheological characteristics of the fluid play a critical role in bubble dynamics.
- Numerical simulations provide a reliable method for studying complex fluid-bubble interactions.
More Related Videos
11:14A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level
Published on: January 10, 2017
09:37Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
Published on: August 26, 2019
Related Concept Videos
Newtonian Fluid: Problem Solving
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
Pressure Variation in a Fluid at Rest
When measuring pressure at two different levels within the fluid, the difference in...
Pressure of Fluids
Viscosity of Fluid
Surface Tension of Fluid
Surface tension varies...
Capillarity in Fluid
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
