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08:01
The Diffusion of Passive Tracers in Laminar Shear Flow
Published on: May 1, 2018
Bubble formation in lattice Boltzmann immiscible shear flow
1Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Hyojia-Dong San 31, Pohang 790-784, South Korea. rsqin@postech.ac.kr
The Journal of Chemical Physics
|March 27, 2007
Summary
Shear flow accelerates bubble growth in van der Waals fluids, though its effect lessens at high undercoolings. Bubble formation dynamics are explored using lattice Boltzmann simulations.
Area of Science:
- Thermodynamics
- Fluid Dynamics
- Computational Physics
Background:
- Bubble formation is a critical phenomenon in phase transitions.
- Understanding bubble dynamics under external forces like shear is essential for various applications.
- Classical phase transition theory provides a baseline for bubble nucleation and growth.
Purpose of the Study:
- To investigate bubble formation in a van der Waals fluid.
- To analyze the impact of shear flow on bubble formation and growth dynamics.
- To compare simulation results with classical phase transition theory.
Main Methods:
- Lattice Boltzmann mesoscale simulations were employed.
- The study focused on a van der Waals fluid model.
- Both shear and no-shear conditions were simulated.
Main Results:
- In the absence of shear, increased undercooling led to more bubbles but shorter incubation times.
- Shear flow did not affect the maximum number of bubbles formed.
- Shear flow accelerated bubble growth, with this effect diminishing at high undercoolings.
Conclusions:
- Simulation results align with classical phase transition theory.
- Shear flow enhances bubble growth rate in van der Waals fluids.
- At high undercoolings, bubble growth shifts from coarsening to coalescence, reducing shear effect.
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